MOT Risk Index.co.uk

Mercedes-Benz SLK MOT pass rate and common problems

75.5% of Mercedes-Benz SLKs passed the 2024 MOT (56,594 first tests): 71.8% at the first attempt and 3.7% after a fix at the test centre (PRS). About 3 in 10 failed the first attempt. For its age, it fails 25% less often than normal: MOT Risk Index 75.2 (95% CI 74.2–76.2; 100 = normal).

Mercedes-Benz SLK at a glance, 2024 MOT
MeasureValueUnitCompared withYearsTests
MOT pass rate75.5%incl. 3.7% fixed at the test centre202456594
Passed at the first attempt71.8%all first tests202456594
MOT Risk Index (95% CI 74.2–76.2)75.2index100 = normal for its age · rank 216 (tied) of 761 (1 = fails least for its age)202456594
Biggest excess: Tyres8.9per 1009.4 same-age2019–2024299040
Dangerous defects9.3per 10011.2 UK, not age-adjusted2019–2024299040
Advisory items125.1per 100127.1 UK, not age-adjusted2019–2024299040
strip · Mercedes-Benz SLK · MOT Risk Index · 75.2 vs 100 = normal · 2024
MOT Risk Index · Mercedes-Benz SLK. 0–240; 100 = normal for its age; median model 92.8 · rank 216 (tied) of 761 (1 = fails least for its age). It would rank between 210 and 232 anywhere within its 95% interval, other models held where they are. DVSA, 2024.
Mercedes-Benz SLK index position among 761 models
MeasureValueUnitCompared withYearsTests
Rank216of 761published models, 1 = fails least for its age202456594
Best rank within its 95% interval210rankother models held where they are202456594
Worst rank within its 95% interval232rankother models held where they are202456594

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Data release dvsa-2024-v2 (24 Sep 2026) · full dataset (v5). This model's index changed from 70.5 to 75.2 in the 24 September 2026 release, after duplicate test records were removed.

What actually fails on a Mercedes-Benz SLK MOT, and how often?

Mercedes-Benz SLK MOTs fail most often on suspension: 15.7 per 100 tests, against 21.9 for UK cars of the same age (2019–2024, n = 299,040).

bar · Mercedes-Benz SLK · Suspension · 15.7 vs 21.9 · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Suspension15.7per 10021.92019–202446975
Lamps, reflectors and electrical equipment12.2per 10025.72019–202436381
Brakes9.1per 10016.62019–202427338
Tyres8.9per 1009.42019–202426704
Visibility5.7per 1009.82019–202417119
Noise, emissions and leaks2.6per 1006.02019–20247873

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 299,040 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Tyres, brakes and suspension: how does the Mercedes-Benz SLK compare with cars of the same age?

The biggest excess for the Mercedes-Benz SLK is tyres at age 3: 7.6 failures per 100 tests, against 4.2 for same-age cars of comparable models (2019–2024, n = 1,199).

bullet · Mercedes-Benz SLK · Tyres, age 3 · 7.6 vs 4.2 · 2019–2024
Tyres, age 3: 7.6 vs 4.2. Brakes, age 3: 0.1 vs 1.8. Suspension, age 3: 0 vs 0.6. Tyres, age 4: 7.7 vs 4.5. Brakes, age 4: 0.5 vs 2.4. Suspension, age 4: 0.7 vs 1.2. Tyres, age 5: 7.5 vs 5.1. Brakes, age 5: 0.9 vs 3.1. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Tyres, age 37.6per 1004.22019–20241199
Brakes, age 30.1per 1001.82019–20241199
Suspension, age 30per 1000.62019–20241199
Tyres, age 47.7per 1004.52019–20245904
Brakes, age 40.5per 1002.42019–20245904
Suspension, age 40.7per 1001.22019–20245904
Tyres, age 57.5per 1005.12019–202411162
Brakes, age 50.9per 1003.12019–202411162
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Suspension, age 51.4per 1002.22019–202411162
Tyres, age 67.5per 1005.52019–202415722
Brakes, age 61.5per 1003.82019–202415722
Suspension, age 62.7per 1003.72019–202415722
Tyres, age 77.3per 1006.02019–202418416
Brakes, age 72.2per 1004.52019–202418416
Suspension, age 74.6per 1005.72019–202418416
Tyres, age 87.5per 1006.32019–202418832
Brakes, age 82.6per 1005.42019–202418832
Suspension, age 86.6per 1007.82019–202418832

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Will my Mercedes-Benz SLK's advisory become a fail at the next MOT?

Mercedes-Benz SLK advisories turn into fails less often than on the median model; the one to watch is lamps, reflectors and electrical equipment: advisories on it became a fail at the next MOT 20.9% of the time.

funnel · Mercedes-Benz SLK · Lamps, reflectors and electrical equipment · 20.9 vs median model · 2019–2024
Advisories on lamps, reflectors and electrical equipment: 20.9 of 100 became a fail on the same item at the next MOT. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Lamps, reflectors and electrical equipment20.9% next failmedian model2019–20246275
Suspension18.1% next failmedian model2019–202428695
Tyres10.6% next failmedian model2019–202452340
Brakes10.5% next failmedian model2019–202445923
Steering7.4% next failmedian model2019–20242611
Body, chassis, structure5.2% next failmedian model2019–20247939
Noise, emissions and leaks4.8% next failmedian model2019–20247839
Identification of the vehicle2.3% next failmedian model2019–20243012
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Road wheels1.4% next failmedian model2019–20242527
Non-component advisories0% next failmedian model2019–20248638

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

My Mercedes-Benz SLK got an MOT advisory: what gets flagged most?

Mercedes-Benz SLK MOTs flag tyres most: 39.5 advisories per 100 tests, against 39.7 across UK tests (2019–2024, n = 299,040).

bar · Mercedes-Benz SLK · Tyres · 39.5 vs 39.7 · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Tyres39.5per 10039.72019–2024118077
Brakes39.3per 10034.72019–2024117430
Suspension24.7per 10026.22019–202473920
Body, chassis, structure4.4per 1004.62019–202413270
Non-component advisories4.3per 1007.82019–202412822
Lamps, reflectors and electrical equipment4.3per 1002.82019–202412819

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 299,040 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

What is likely to fail next on a Mercedes-Benz SLK?

For Mercedes-Benz SLKs aged 6 to 8 whose last MOT was a pass, the item most likely to fail at the next MOT is suspension: 6.6% failed on it (2019–2024, n = 29,931).

bar · Mercedes-Benz SLK · Tyres, under 3 years old, after a pass · 6.4 vs baseline · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Tyres, under 3 years old, after a pass6.4% next fail2019–2024609
Visibility, under 3 years old, after a pass2.1% next fail2019–2024609
Tyres, under 3 years old, after an advisory (rough estimate: 146 cars)10.3% next fail2019–2024146
Tyres, under 3 years old, after a fail (rough estimate: 103 cars)11.7% next fail2019–2024103
Tyres, 3 to 5 years old, after a pass5.7% next fail2019–202416295
Suspension, 3 to 5 years old, after a pass2.2% next fail2019–202416295
Visibility, 3 to 5 years old, after a pass1.9% next fail2019–202416295
Brakes, 3 to 5 years old, after a pass1.0% next fail2019–202416295
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Lamps, reflectors and electrical equipment, 3 to 5 years old, after a pass1.0% next fail2019–202416295
Noise, emissions and leaks, 3 to 5 years old, after a pass0.3% next fail2019–202416295
Identification of the vehicle, 3 to 5 years old, after a pass0.2% next fail2019–202416295
Road wheels, 3 to 5 years old, after a pass0.1% next fail2019–202416295
Seat belts and supplementary restraint systems, 3 to 5 years old, after a pass0.1% next fail2019–202416295
Steering, 3 to 5 years old, after a pass0.1% next fail2019–202416295
Body, chassis, structure, 3 to 5 years old, after a pass0.1% next fail2019–202416295
Tyres, 3 to 5 years old, after an advisory9.4% next fail2019–20245688
Suspension, 3 to 5 years old, after an advisory3.6% next fail2019–20245688
Visibility, 3 to 5 years old, after an advisory3.3% next fail2019–20245688
Brakes, 3 to 5 years old, after an advisory1.8% next fail2019–20245688
Lamps, reflectors and electrical equipment, 3 to 5 years old, after an advisory1.6% next fail2019–20245688
Noise, emissions and leaks, 3 to 5 years old, after an advisory0.4% next fail2019–20245688
Road wheels, 3 to 5 years old, after an advisory0.4% next fail2019–20245688
Identification of the vehicle, 3 to 5 years old, after an advisory0.3% next fail2019–20245688
Seat belts and supplementary restraint systems, 3 to 5 years old, after an advisory0.2% next fail2019–20245688
Body, chassis, structure, 3 to 5 years old, after an advisory0.2% next fail2019–20245688
Steering, 3 to 5 years old, after an advisory0.1% next fail2019–20245688
Tyres, 3 to 5 years old, after a fail9.1% next fail2019–20243216
Suspension, 3 to 5 years old, after a fail3.3% next fail2019–20243216
Visibility, 3 to 5 years old, after a fail3.2% next fail2019–20243216
Lamps, reflectors and electrical equipment, 3 to 5 years old, after a fail2.0% next fail2019–20243216
Brakes, 3 to 5 years old, after a fail1.9% next fail2019–20243216
Identification of the vehicle, 3 to 5 years old, after a fail0.4% next fail2019–20243216
Road wheels, 3 to 5 years old, after a fail0.4% next fail2019–20243216
Seat belts and supplementary restraint systems, 3 to 5 years old, after a fail0.3% next fail2019–20243216
Noise, emissions and leaks, 3 to 5 years old, after a fail0.2% next fail2019–20243216
Steering, 3 to 5 years old, after a fail0.2% next fail2019–20243216
Suspension, 6 to 8 years old, after a pass6.6% next fail2019–202429931
Tyres, 6 to 8 years old, after a pass5.8% next fail2019–202429931
Visibility, 6 to 8 years old, after a pass2.3% next fail2019–202429931
Brakes, 6 to 8 years old, after a pass2.1% next fail2019–202429931
Lamps, reflectors and electrical equipment, 6 to 8 years old, after a pass1.9% next fail2019–202429931
Noise, emissions and leaks, 6 to 8 years old, after a pass0.5% next fail2019–202429931
Road wheels, 6 to 8 years old, after a pass0.3% next fail2019–202429931
Identification of the vehicle, 6 to 8 years old, after a pass0.3% next fail2019–202429931
Seat belts and supplementary restraint systems, 6 to 8 years old, after a pass0.2% next fail2019–202429931
Body, chassis, structure, 6 to 8 years old, after a pass0.2% next fail2019–202429931
Steering, 6 to 8 years old, after a pass0.1% next fail2019–202429931
Tyres, 6 to 8 years old, after an advisory10.2% next fail2019–202413354
Suspension, 6 to 8 years old, after an advisory9.6% next fail2019–202413354
Visibility, 6 to 8 years old, after an advisory3.9% next fail2019–202413354
Brakes, 6 to 8 years old, after an advisory3.4% next fail2019–202413354
Lamps, reflectors and electrical equipment, 6 to 8 years old, after an advisory3.0% next fail2019–202413354
Noise, emissions and leaks, 6 to 8 years old, after an advisory0.7% next fail2019–202413354
Seat belts and supplementary restraint systems, 6 to 8 years old, after an advisory0.3% next fail2019–202413354
Road wheels, 6 to 8 years old, after an advisory0.3% next fail2019–202413354
Identification of the vehicle, 6 to 8 years old, after an advisory0.3% next fail2019–202413354
Body, chassis, structure, 6 to 8 years old, after an advisory0.3% next fail2019–202413354
Steering, 6 to 8 years old, after an advisory0.2% next fail2019–202413354
Suspension, 6 to 8 years old, after a fail11.8% next fail2019–20248913
Tyres, 6 to 8 years old, after a fail9.9% next fail2019–20248913
Brakes, 6 to 8 years old, after a fail4.7% next fail2019–20248913
Visibility, 6 to 8 years old, after a fail4.4% next fail2019–20248913
Lamps, reflectors and electrical equipment, 6 to 8 years old, after a fail3.8% next fail2019–20248913
Noise, emissions and leaks, 6 to 8 years old, after a fail1.2% next fail2019–20248913
Identification of the vehicle, 6 to 8 years old, after a fail0.5% next fail2019–20248913
Seat belts and supplementary restraint systems, 6 to 8 years old, after a fail0.4% next fail2019–20248913
Road wheels, 6 to 8 years old, after a fail0.4% next fail2019–20248913
Body, chassis, structure, 6 to 8 years old, after a fail0.3% next fail2019–20248913
Steering, 6 to 8 years old, after a fail0.2% next fail2019–20248913
Suspension, 9 to 11 years old, after a pass11.6% next fail2019–202418842
Tyres, 9 to 11 years old, after a pass5.2% next fail2019–202418842
Lamps, reflectors and electrical equipment, 9 to 11 years old, after a pass3.3% next fail2019–202418842
Brakes, 9 to 11 years old, after a pass3.2% next fail2019–202418842
Visibility, 9 to 11 years old, after a pass2.6% next fail2019–202418842
Noise, emissions and leaks, 9 to 11 years old, after a pass0.6% next fail2019–202418842
Body, chassis, structure, 9 to 11 years old, after a pass0.4% next fail2019–202418842
Seat belts and supplementary restraint systems, 9 to 11 years old, after a pass0.4% next fail2019–202418842
Road wheels, 9 to 11 years old, after a pass0.3% next fail2019–202418842
Identification of the vehicle, 9 to 11 years old, after a pass0.2% next fail2019–202418842
Steering, 9 to 11 years old, after a pass0.2% next fail2019–202418842
Suspension, 9 to 11 years old, after an advisory17.1% next fail2019–202410738
Tyres, 9 to 11 years old, after an advisory9.1% next fail2019–202410738
Brakes, 9 to 11 years old, after an advisory6.7% next fail2019–202410738
Visibility, 9 to 11 years old, after an advisory4.8% next fail2019–202410738
Lamps, reflectors and electrical equipment, 9 to 11 years old, after an advisory4.7% next fail2019–202410738
Noise, emissions and leaks, 9 to 11 years old, after an advisory1.1% next fail2019–202410738
Body, chassis, structure, 9 to 11 years old, after an advisory0.6% next fail2019–202410738
Seat belts and supplementary restraint systems, 9 to 11 years old, after an advisory0.6% next fail2019–202410738
Road wheels, 9 to 11 years old, after an advisory0.4% next fail2019–202410738
Identification of the vehicle, 9 to 11 years old, after an advisory0.2% next fail2019–202410738
Steering, 9 to 11 years old, after an advisory0.2% next fail2019–202410738
Suspension, 9 to 11 years old, after a fail18.1% next fail2019–20249083
Tyres, 9 to 11 years old, after a fail8.3% next fail2019–20249083
Brakes, 9 to 11 years old, after a fail7.1% next fail2019–20249083
Lamps, reflectors and electrical equipment, 9 to 11 years old, after a fail6.2% next fail2019–20249083
Visibility, 9 to 11 years old, after a fail5.2% next fail2019–20249083
Noise, emissions and leaks, 9 to 11 years old, after a fail1.5% next fail2019–20249083
Body, chassis, structure, 9 to 11 years old, after a fail0.9% next fail2019–20249083
Seat belts and supplementary restraint systems, 9 to 11 years old, after a fail0.7% next fail2019–20249083
Road wheels, 9 to 11 years old, after a fail0.5% next fail2019–20249083
Identification of the vehicle, 9 to 11 years old, after a fail0.3% next fail2019–20249083
Steering, 9 to 11 years old, after a fail0.3% next fail2019–20249083
Suspension, 12 to 14 years old, after a pass13% next fail2019–202413526
Brakes, 12 to 14 years old, after a pass5.3% next fail2019–202413526
Lamps, reflectors and electrical equipment, 12 to 14 years old, after a pass5.0% next fail2019–202413526
Tyres, 12 to 14 years old, after a pass3.8% next fail2019–202413526
Visibility, 12 to 14 years old, after a pass3.6% next fail2019–202413526
Noise, emissions and leaks, 12 to 14 years old, after a pass1.2% next fail2019–202413526
Seat belts and supplementary restraint systems, 12 to 14 years old, after a pass0.9% next fail2019–202413526
Body, chassis, structure, 12 to 14 years old, after a pass0.9% next fail2019–202413526
Steering, 12 to 14 years old, after a pass0.5% next fail2019–202413526
Identification of the vehicle, 12 to 14 years old, after a pass0.2% next fail2019–202413526
Road wheels, 12 to 14 years old, after a pass0.2% next fail2019–202413526
Suspension, 12 to 14 years old, after an advisory18.3% next fail2019–20249336
Brakes, 12 to 14 years old, after an advisory8.4% next fail2019–20249336
Lamps, reflectors and electrical equipment, 12 to 14 years old, after an advisory8.1% next fail2019–20249336
Tyres, 12 to 14 years old, after an advisory6.5% next fail2019–20249336
Visibility, 12 to 14 years old, after an advisory5.9% next fail2019–20249336
Noise, emissions and leaks, 12 to 14 years old, after an advisory2.2% next fail2019–20249336
Body, chassis, structure, 12 to 14 years old, after an advisory1.5% next fail2019–20249336
Seat belts and supplementary restraint systems, 12 to 14 years old, after an advisory1.5% next fail2019–20249336
Steering, 12 to 14 years old, after an advisory0.9% next fail2019–20249336
Road wheels, 12 to 14 years old, after an advisory0.4% next fail2019–20249336
Identification of the vehicle, 12 to 14 years old, after an advisory0.4% next fail2019–20249336
Suspension, 12 to 14 years old, after a fail20.8% next fail2019–20249770
Brakes, 12 to 14 years old, after a fail10.3% next fail2019–20249770
Lamps, reflectors and electrical equipment, 12 to 14 years old, after a fail9.7% next fail2019–20249770
Tyres, 12 to 14 years old, after a fail7.1% next fail2019–20249770
Visibility, 12 to 14 years old, after a fail7.0% next fail2019–20249770
Noise, emissions and leaks, 12 to 14 years old, after a fail3.5% next fail2019–20249770
Seat belts and supplementary restraint systems, 12 to 14 years old, after a fail2.4% next fail2019–20249770
Body, chassis, structure, 12 to 14 years old, after a fail2.1% next fail2019–20249770
Steering, 12 to 14 years old, after a fail1.2% next fail2019–20249770
Identification of the vehicle, 12 to 14 years old, after a fail0.5% next fail2019–20249770
Road wheels, 12 to 14 years old, after a fail0.4% next fail2019–20249770
Suspension, 15 to 19 years old, after a pass10.8% next fail2019–202421819
Lamps, reflectors and electrical equipment, 15 to 19 years old, after a pass6.9% next fail2019–202421819
Brakes, 15 to 19 years old, after a pass4.9% next fail2019–202421819
Visibility, 15 to 19 years old, after a pass3.8% next fail2019–202421819
Tyres, 15 to 19 years old, after a pass3.2% next fail2019–202421819
Noise, emissions and leaks, 15 to 19 years old, after a pass2.0% next fail2019–202421819
Steering, 15 to 19 years old, after a pass1.8% next fail2019–202421819
Body, chassis, structure, 15 to 19 years old, after a pass1.4% next fail2019–202421819
Seat belts and supplementary restraint systems, 15 to 19 years old, after a pass1.0% next fail2019–202421819
Road wheels, 15 to 19 years old, after a pass0.3% next fail2019–202421819
Identification of the vehicle, 15 to 19 years old, after a pass0.2% next fail2019–202421819
Suspension, 15 to 19 years old, after an advisory16.2% next fail2019–202417648
Lamps, reflectors and electrical equipment, 15 to 19 years old, after an advisory12.9% next fail2019–202417648
Brakes, 15 to 19 years old, after an advisory8.8% next fail2019–202417648
Visibility, 15 to 19 years old, after an advisory7.0% next fail2019–202417648
Tyres, 15 to 19 years old, after an advisory6.4% next fail2019–202417648
Noise, emissions and leaks, 15 to 19 years old, after an advisory3.4% next fail2019–202417648
Steering, 15 to 19 years old, after an advisory3% next fail2019–202417648
Body, chassis, structure, 15 to 19 years old, after an advisory2.4% next fail2019–202417648
Seat belts and supplementary restraint systems, 15 to 19 years old, after an advisory1.7% next fail2019–202417648
Road wheels, 15 to 19 years old, after an advisory0.4% next fail2019–202417648
Identification of the vehicle, 15 to 19 years old, after an advisory0.4% next fail2019–202417648
Suspension, 15 to 19 years old, after a fail18.4% next fail2019–202419015
Lamps, reflectors and electrical equipment, 15 to 19 years old, after a fail16.3% next fail2019–202419015
Brakes, 15 to 19 years old, after a fail10.6% next fail2019–202419015
Visibility, 15 to 19 years old, after a fail8.3% next fail2019–202419015
Tyres, 15 to 19 years old, after a fail6.4% next fail2019–202419015
Noise, emissions and leaks, 15 to 19 years old, after a fail5.3% next fail2019–202419015
Steering, 15 to 19 years old, after a fail3.3% next fail2019–202419015
Body, chassis, structure, 15 to 19 years old, after a fail3.1% next fail2019–202419015
Seat belts and supplementary restraint systems, 15 to 19 years old, after a fail2.4% next fail2019–202419015
Road wheels, 15 to 19 years old, after a fail0.6% next fail2019–202419015
Identification of the vehicle, 15 to 19 years old, after a fail0.5% next fail2019–202419015
Lamps, reflectors and electrical equipment, 20 years or older, after a pass9.4% next fail2019–20249272
Visibility, 20 years or older, after a pass5.8% next fail2019–20249272
Brakes, 20 years or older, after a pass4.3% next fail2019–20249272
Suspension, 20 years or older, after a pass3.3% next fail2019–20249272
Tyres, 20 years or older, after a pass2.2% next fail2019–20249272
Noise, emissions and leaks, 20 years or older, after a pass1.9% next fail2019–20249272
Steering, 20 years or older, after a pass1.7% next fail2019–20249272
Body, chassis, structure, 20 years or older, after a pass1.6% next fail2019–20249272
Seat belts and supplementary restraint systems, 20 years or older, after a pass0.8% next fail2019–20249272
Road wheels, 20 years or older, after a pass0.2% next fail2019–20249272
Identification of the vehicle, 20 years or older, after a pass0.2% next fail2019–20249272
Lamps, reflectors and electrical equipment, 20 years or older, after an advisory17.5% next fail2019–20248882
Visibility, 20 years or older, after an advisory9.5% next fail2019–20248882
Brakes, 20 years or older, after an advisory7.6% next fail2019–20248882
Suspension, 20 years or older, after an advisory7.0% next fail2019–20248882
Tyres, 20 years or older, after an advisory5.3% next fail2019–20248882
Steering, 20 years or older, after an advisory3.6% next fail2019–20248882
Body, chassis, structure, 20 years or older, after an advisory3.4% next fail2019–20248882
Noise, emissions and leaks, 20 years or older, after an advisory3.4% next fail2019–20248882
Seat belts and supplementary restraint systems, 20 years or older, after an advisory1.3% next fail2019–20248882
Identification of the vehicle, 20 years or older, after an advisory0.3% next fail2019–20248882
Road wheels, 20 years or older, after an advisory0.3% next fail2019–20248882
Lamps, reflectors and electrical equipment, 20 years or older, after a fail24.2% next fail2019–20247934
Visibility, 20 years or older, after a fail11.7% next fail2019–20247934
Brakes, 20 years or older, after a fail9.9% next fail2019–20247934
Suspension, 20 years or older, after a fail8.3% next fail2019–20247934
Tyres, 20 years or older, after a fail6.1% next fail2019–20247934
Noise, emissions and leaks, 20 years or older, after a fail5.0% next fail2019–20247934
Body, chassis, structure, 20 years or older, after a fail4.4% next fail2019–20247934
Steering, 20 years or older, after a fail4.0% next fail2019–20247934
Seat belts and supplementary restraint systems, 20 years or older, after a fail1.7% next fail2019–20247934
Identification of the vehicle, 20 years or older, after a fail0.6% next fail2019–20247934
Road wheels, 20 years or older, after a fail0.6% next fail2019–20247934
Speedometer and speed limiter, 20 years or older, after a fail0.1% next fail2019–20247934
Lamps, reflectors and electrical equipment, an unknown age, after a fail (rough estimate: 87 cars)20.7% next fail2019–202487
Visibility, an unknown age, after a fail (rough estimate: 87 cars)6.9% next fail2019–202487
Brakes, an unknown age, after a fail (rough estimate: 87 cars)5.8% next fail2019–202487
Suspension, an unknown age, after a fail (rough estimate: 87 cars)5.8% next fail2019–202487

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How often does a Mercedes-Benz SLK get a dangerous MOT defect?

The Mercedes-Benz SLK gets a dangerous defect less often than the UK average: 9.3 per 100 first tests against 11.2 across the UK. In the same tests, 40.3 major and 9.8 minor defects were recorded per 100 tests (one test can record several).

bullet · Mercedes-Benz SLK · Dangerous defects · 9.3 vs 11.2 · 2019–2024
Dangerous defects: 9.3 vs 11.2. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Dangerous defects9.3per 10011.22019–2024299040

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 299,040 (initial tests) · Method: one initial test per test_id; severity not recorded for some 2018–2021 tests · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Will my Mercedes-Benz SLK still pass its MOT in a few years?

First-time MOT failures for the Mercedes-Benz SLK go from 18.1% at age 8 to 32.7% at age 19, against 43.5% for all cars aged 19 (2024, n = 56,594).

line · Mercedes-Benz SLK · Age 8 · 18.1 vs 23.3 · 2024
Age 8: 18.1. Age 19: 32.7. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 818.1% failed first time23.320241236
Age 919.5% failed first time26.520244851
Age 1021.4% failed first time30.120244825
Age 1124.9% failed first time33.220244526
Age 1225.7% failed first time35.720245529
Age 1322.9% failed first time38.220242501
Age 1430.6% failed first time40.420242081
Age 1529.4% failed first time41.620242459
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 1631.6% failed first time43.120243141
Age 1732.4% failed first time43.120243478
Age 1832.1% failed first time43.920243628
Age 1932.7% failed first time43.520244677

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How does the Mercedes-Benz SLK compare with cars of its own age and size?

At 1 of 18 ages shown, Mercedes-Benz SLKs fail first time more often than comparable models of the same size class; the biggest difference is at age 17, where they fail less often: 32.4% against 37.6% (2024, n = 17,302).

line · Mercedes-Benz SLK · Age 3 · 11.3 vs 10.8 · 2024
Age 3: 11.3. Age 20: 33.1. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 311.3% fail10.820241199
Age 412.1% fail12.320245904
Age 512.9% fail14.2202411162
Age 614.6% fail16.1202415722
Age 715.9% fail18.3202418416
Age 817.8% fail20.6202418832
Age 920.4% fail23.1202421220
Age 1022.5% fail25.7202419111
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 1124.2% fail28.3202416410
Age 1226.2% fail30.6202414317
Age 1328.0% fail32.7202412065
Age 1430.5% fail34.6202414480
Age 1531.2% fail36.1202416536
Age 1632.3% fail37.2202417597
Age 1732.4% fail37.6202417302
Age 1833.2% fail38.0202416227
Age 1932.6% fail37.6202414422
Age 2033.1% fail37.1202411003

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz SLK years should I avoid?

The Mercedes-Benz SLK build year that fails most for its age is 2013: index 108.6 (95% CI 105.8–111.4) against the model's own age norm of 100 (2019–2024, n = 27,606).

Build year matters for the Mercedes-Benz SLK: 2013 Mercedes-Benz SLKs fail more than their age would predict, 2011 ones less. Years whose confidence interval includes normal are shown without a label.

bar · Mercedes-Benz SLK · Build year 1999 (rough estimate: 2,058 tests, 95% interval 97.1–113.1) · 105.1 vs 100 = normal · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Build year 1999 (rough estimate: 2,058 tests, 95% interval 97.1–113.1)105.1index vs own age100 = normal2019–20242058
Build year 200099.5index vs own age100 = normal2019–20246728
Build year 200197.1index vs own age100 = normal2019–202410092
Build year 2002 (better for its age)95.1index vs own age100 = normal2019–202410334
Build year 2003 (worse for its age)105index vs own age100 = normal2019–20248913
Build year 2004 (worse for its age)108.5index vs own age100 = normal2019–202415686
Build year 2005100.3index vs own age100 = normal2019–202423960
Build year 2006100.2index vs own age100 = normal2019–202417113
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Build year 2007102.6index vs own age100 = normal2019–202415823
Build year 2008 (worse for its age)103.1index vs own age100 = normal2019–202414696
Build year 2009 (worse for its age)105.6index vs own age100 = normal2019–202411542
Build year 2010 (worse for its age)107.8index vs own age100 = normal2019–20249750
Build year 2011 (better for its age)90.1index vs own age100 = normal2019–202411156
Build year 2012101.1index vs own age100 = normal2019–202427991
Build year 2013 (worse for its age)108.6index vs own age100 = normal2019–202427606
Build year 201497.9index vs own age100 = normal2019–202429492
Build year 2015 (better for its age)95.3index vs own age100 = normal2019–202428951
Build year 2016 (better for its age)91.1index vs own age100 = normal2019–20247462

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How much does it cost to fix a Mercedes-Benz SLK MOT fail?

Expected repair cost per Mercedes-Benz SLK MOT: about £72 (up to about £137 if more expensive parts are needed), from the chance of failing each item and its most common UK repair price (catalogue estimate, n = 56,594).

Computed, not measured.

bar · Mercedes-Benz SLK · Expected repair bill · 72.2 vs modal price catalogue · price catalogue
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (price catalogue)
MeasureValueUnitCompared withYearsTests
Expected repair bill72.2GBP estimatemodal price catalogueprice catalogue56594
Estimated range lower72.2GBP estimatemodal price catalogueprice catalogue56594
Estimated range upper137.2GBP estimatemodal price catalogueprice catalogue56594
Suspension: Suspension coil spring (single corner)28.3GBP expected contribution180price catalogue56594
Lamps, reflectors and electrical equipment: Battery replacement (standard 12V lead-acid)17.1GBP expected contribution140price catalogue56594
Brakes: Front brake pads (parts + labour, typical hatchback)13.7GBP expected contribution150price catalogue56594
Tyres: Tyre (single mid-range 16" fitted)8.0GBP expected contribution90price catalogue56594
Noise, emissions and leaks: Exhaust rear silencer5.2GBP expected contribution200price catalogue56594

Source: DVSA MOT bulk data · Window: price catalogue · n = 56,594 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Is the Mercedes-Benz SLK more reliable than similar cars?

Of 8 similar models, 4 fail less often for their age than the Mercedes-Benz SLK and 4 as often or more. The Mercedes-Benz SLK has an MOT Risk Index of 75.2, where 100 = normal for its age (2024, n = 56,594).

bar · Mercedes-Benz SLK · Mercedes-Benz SLK (this model) · 75.2 vs 100 = normal · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Mercedes-Benz SLK (this model)75.2index100 = normal202456594
Mercedes-Benz GLC75.6index75.2202478203
Mercedes-Benz GLA81.3index75.2202487343
BMW X573.5index75.2202491002
Audi Q769.8index75.2202448856
Land Rover Range Rover70.9index75.2202489169
Mercedes-Benz E-Class80.7index75.22024229181
Land Rover Range Rover Sport72.5index75.22024117761
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Jaguar XF82.6index75.2202498155

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How many miles does a Mercedes-Benz SLK normally do?

At age 8, the median Mercedes-Benz SLK had covered 39,611 miles by its MOT; the middle half ranged from 27,815 to 52,537 miles (2024, n = 1,236).

line · Mercedes-Benz SLK · Age 8 median · 39611 vs baseline · 2024
Age 8 median: 39611. Age 19 P75: 100680. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 8 median39611miles20241236
Age 8 P2527815miles20241236
Age 8 P7552537miles20241236
Age 9 median45507miles20244851
Age 9 P2532322miles20244851
Age 9 P7559879miles20244851
Age 10 median51552miles20244825
Age 10 P2537450miles20244825
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 10 P7568327miles20244825
Age 11 median58837miles20244526
Age 11 P2544516miles20244526
Age 11 P7576505miles20244526
Age 12 median60550miles20245529
Age 12 P2545197miles20245529
Age 12 P7578530miles20245529
Age 13 median58040miles20242501
Age 13 P2542672miles20242501
Age 13 P7575096miles20242501
Age 14 median62264miles20242081
Age 14 P2546770miles20242081
Age 14 P7580401miles20242081
Age 15 median66832miles20242459
Age 15 P2549434miles20242459
Age 15 P7585626miles20242459
Age 16 median71779miles20243141
Age 16 P2554572miles20243141
Age 16 P7591615miles20243141
Age 17 median73068miles20243478
Age 17 P2554535miles20243478
Age 17 P7594045miles20243478
Age 18 median78037miles20243628
Age 18 P2557469miles20243628
Age 18 P7599239miles20243628
Age 19 median79442miles20244677
Age 19 P2559443miles20244677
Age 19 P75100680miles20244677

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does high mileage mean more Mercedes-Benz SLK MOT failures at the same age?

At ages 15+, 17.0% of Mercedes-Benz SLKs with under 40,000 miles failed first time, against 44.0% of those with over 140,000 miles (2024, n = 3,756). Inside this age group, higher mileage goes with more failures.

bar · Mercedes-Benz SLK · Age 6–9, <40k miles · 12.5 vs baseline · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 6–9, <40k miles12.5% failed first time20242543
Age 6–9, 40-70k miles22.5% failed first time20242793
Age 6–9, 70-100k miles28.1% failed first time2024633
Age 6–9, 100-140k miles (rough estimate: 110 tests, 95% interval 26.3–43.8%)34.5% failed first time2024110
Age 10–14, <40k miles14.1% failed first time20244130
Age 10–14, 40-70k miles24.2% failed first time20249153
Age 10–14, 70-100k miles30.8% failed first time20244783
Age 10–14, 100-140k miles37.1% failed first time20241239
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 10–14, 140k+ miles (rough estimate: 154 tests, 95% interval 30.4–45.5%)37.7% failed first time2024154
Age 15+, <40k miles17% failed first time20242638
Age 15+, 40-70k miles26.6% failed first time20248597
Age 15+, 70-100k miles34.8% failed first time20249978
Age 15+, 100-140k miles39.9% failed first time20245951
Age 15+, 140k+ miles44% failed first time20241118

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How many miles does a Mercedes-Benz SLK last?

13.9% of Mercedes-Benz SLKs tested had reached 100,000 miles, and 1.4% had reached 150,000 (2024, n = 41,520).

line · Mercedes-Benz SLK · 100,000 miles · 13.9 vs baseline · 2024
100,000 miles: 13.9. 200,000 miles (rou: 0.1. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
100,000 miles13.9% of tested cars202441520
150,000 miles1.4% of tested cars20244156
200,000 miles (rough estimate: 375 tests, 95% interval 0.1–0.1%)0.1% of tested cars2024375

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Is the Mercedes-Benz SLK driven more or less than average, and does that change the picture?

Matched on annual mileage as well as age, the Mercedes-Benz SLK index is 78.5, against 71.4 on age alone (2019–2024, n = 56,594).

slope · Mercedes-Benz SLK · Age and mileage adjusted index · 78.5 vs 71.4 · 2019–2024
Age and mileage adjusted index: 71.4 vs 78.5. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Age and mileage adjusted index78.5index71.42019–202456594

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz SLK fuel fails its MOT less?

Petrol Mercedes-Benz SLKs fail first time more often than diesel ones, before allowing for age: 29.3% against 24.4%.

bar · Mercedes-Benz SLK · Diesel · 24.4 vs other fuels · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Diesel24.4% fail first timeother fuels202413296
Petrol29.3% fail first timeother fuels202443292

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz SLK engine is best?

For its age, the best Mercedes-Benz SLK engine is the petrol over 2.0 litre at index 94.7, and the worst the diesel over 2.0 litre at 109.0, where 100 = the model's own average (2024, n = 56,594).

bar · Mercedes-Benz SLK · Diesel 1.5–1.8 litre (rough estimate: 218 tests, 95% interval 70.0–113.5) · 89.9 vs 100 = model average · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Diesel 1.5–1.8 litre (rough estimate: 218 tests, 95% interval 70.0–113.5)89.9index vs model norm100 = model average2024218
Petrol over 2.0 litre94.7index vs model norm100 = model average202495881
Petrol 1.5–1.8 litre98.5index vs model norm100 = model average202475094
Petrol 1.8–2.0 litre104.2index vs model norm100 = model average202446743
Diesel over 2.0 litre109index vs model norm100 = model average202478119

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Where in Britain does the Mercedes-Benz SLK fail its MOT most?

First-time failure rates for the Mercedes-Benz SLK range from 18.8% in the Sutton (SM) postcode area to 38.1% in the Kirkcaldy (KY) postcode area, before allowing for age: a wider spread by area than for the typical model.

map · Mercedes-Benz SLK · Kirkcaldy (KY) · 38.1 vs 28.2 · 2024
Scotland. N. England. Wales. London. S. West. % failing. 21%. 31%. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Kirkcaldy (KY)38.1% fail first time28.220241308
Aberdeen (AB)33.0% fail first time28.220241598
Inverness (IV)32.6% fail first time28.22024770
Sutton (SM)18.8% fail first time28.22024675
Romford (RM)20.2% fail first time28.220241750
Kingston upon Thames (KT)20.5% fail first time28.220243909
Paisley (PA)32.5% fail first time28.220241079
Kirkwall (KW) (rough estimate: 113 tests, 95% interval 24.0–40.9%)31.9% fail first time28.22024113
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Hull (HU)31.3% fail first time28.220241946
Watford (WD)30.9% fail first time28.220241278
Perth (PH)30.9% fail first time28.22024638
Bristol (BS)30.6% fail first time28.220245254
Plymouth (PL)30.4% fail first time28.220243081
Llandrindod Wells (LD) (rough estimate: 211 tests, 95% interval 24.5–36.8%)30.3% fail first time28.22024211
Dundee (DD)30.2% fail first time28.22024940
Edinburgh (EH)29.6% fail first time28.220242720
Dumfries (DG) (rough estimate: 390 tests, 95% interval 25.2–34.2%)29.5% fail first time28.22024390
Exeter (EX)29.2% fail first time28.220243795
Bath (BA)29.1% fail first time28.220242782
Leeds (LS)29.0% fail first time28.220242204
Cardiff (CF)28.8% fail first time28.220244743
Salisbury (SP)28.7% fail first time28.220241990
Brighton (BN)28.7% fail first time28.220244867
Falkirk (FK)28.6% fail first time28.220241104
Newport (NP)28.5% fail first time28.220242321
Lincoln (LN)28.4% fail first time28.220241965
Swansea (SA)28.4% fail first time28.220243614
Portsmouth (PO)28.3% fail first time28.220245332
Dorchester (DT)28.2% fail first time28.220241687
Glasgow (G)28.2% fail first time28.220243428
Cambridge (CB)28.2% fail first time28.220242453
Hereford (HR)28.1% fail first time28.220241055
Harrogate (HG)28.1% fail first time28.220241138
Northampton (NN)28.1% fail first time28.220243934
York (YO)28.1% fail first time28.220243543
Gloucester (GL)28.0% fail first time28.220244263
Blackpool (FY)27.7% fail first time28.220241709
Darlington (DL)27.6% fail first time28.220241602
Telford (TF)27.6% fail first time28.220241100
Huddersfield (HD)27.4% fail first time28.220241133
Taunton (TA)27.4% fail first time28.220242304
Truro (TR)27.3% fail first time28.220242146
Bournemouth (BH)26.9% fail first time28.220245005
Torquay (TQ)26.9% fail first time28.220242294
Oxford (OX)26.9% fail first time28.220243276
Preston (PR)26.9% fail first time28.220242830
Kilmarnock (KA)26.9% fail first time28.220241325
Motherwell (ML)26.8% fail first time28.22024958
Canterbury (CT)26.8% fail first time28.220243147
Galashiels (TD) (rough estimate: 482 tests, 95% interval 23.0–30.9%)26.8% fail first time28.22024482
Norwich (NR)26.7% fail first time28.220245245
Stoke-on-Trent (ST)26.6% fail first time28.220243170
Nottingham (NG)26.6% fail first time28.220245569
Ipswich (IP)26.6% fail first time28.220244361
Swindon (SN)26.5% fail first time28.220242995
Lancaster (LA)26.3% fail first time28.220241212
Stockport (SK)26.3% fail first time28.220243099
Sunderland (SR)26.3% fail first time28.22024852
Worcester (WR)26.1% fail first time28.220242260
Chester (CH)26.0% fail first time28.220243451
Crewe (CW)25.8% fail first time28.220241788
Halifax (HX)25.7% fail first time28.22024654
St Albans (AL)25.7% fail first time28.220241250
Durham (DH)25.7% fail first time28.220241161
London W (W)25.6% fail first time28.22024878
London N (N)25.6% fail first time28.220241607
London SW (SW)25.5% fail first time28.220241546
Bradford (BD)25.4% fail first time28.220242142
Peterborough (PE)25.4% fail first time28.220245981
Leicester (LE)25.3% fail first time28.220244951
Llandudno (LL)25.3% fail first time28.220242649
Guildford (GU)25.1% fail first time28.220245750
Cleveland (TS)25.1% fail first time28.220242607
Wigan (WN)24.9% fail first time28.220241114
Tonbridge (TN)24.9% fail first time28.220245258
Wolverhampton (WV)24.9% fail first time28.220241795
Harrow (HA)24.8% fail first time28.220241413
Southampton (SO)24.7% fail first time28.220244898
Newcastle (NE)24.7% fail first time28.220243948
Milton Keynes (MK)24.6% fail first time28.220243109
Luton (LU)24.6% fail first time28.220241368
Dudley (DY)24.5% fail first time28.220242404
Carlisle (CA)24.4% fail first time28.220241224
Doncaster (DN)24.4% fail first time28.220244188
Walsall (WS)24.3% fail first time28.220242121
Coventry (CV)24.2% fail first time28.220244266
Colchester (CO)24.2% fail first time28.220242805
Liverpool (L)24.0% fail first time28.220241985
Bolton (BL)24% fail first time28.220241629
Shrewsbury (SY)24.0% fail first time28.220241941
Redhill (RH)23.9% fail first time28.220243837
Warrington (WA)23.7% fail first time28.220243117
Chelmsford (CM)23.6% fail first time28.220244481
Birmingham (B)23.6% fail first time28.220247162
London NW (NW)23.5% fail first time28.220241913
Medway (ME)23.1% fail first time28.220243249
Manchester (M)23.1% fail first time28.220242761
London E (E)22.9% fail first time28.220241356
Reading (RG)22.8% fail first time28.220246299
Derby (DE)22.8% fail first time28.220244042
Stevenage (SG)22.7% fail first time28.220242875
Hemel Hempstead (HP)22.6% fail first time28.220243872
Blackburn (BB)22.6% fail first time28.220242098
Wakefield (WF)22.3% fail first time28.220242262
Oldham (OL)22.2% fail first time28.220241106
Ilford (IG)22.1% fail first time28.22024957
London SE (SE)22.1% fail first time28.220242105
Croydon (CR)21.9% fail first time28.220241900
Sheffield (S)21.7% fail first time28.220245940
Twickenham (TW)21.6% fail first time28.220242291
Slough (SL)21.4% fail first time28.220242436
Uxbridge (UB)21.2% fail first time28.220241308
Enfield (EN)21.1% fail first time28.220241766
Bromley (BR)21% fail first time28.22024919
Dartford (DA)20.8% fail first time28.220241906
Southend-on-Sea (SS)20.8% fail first time28.220243132

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does a Mercedes-Benz SLK rust more than average?

Allowing for age, Mercedes-Benz SLK MOTs record corrosion failures at 1.9 times the national rate: 1.48% of tests against 0.77% (2024 + geographic layers, n = 53,884).

Computed, not measured.

slope · Mercedes-Benz SLK · Salt belt susceptibility · 1.9 vs 1 · 2024 + geographic layers
Salt belt susceptibility: 1 vs 1.9. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024 + geographic layers)
MeasureValueUnitCompared withYearsTests
Salt belt susceptibility1.9ratio estimate12024 + geographic layers53884

Source: DVSA MOT bulk data · Window: 2024 + geographic layers · n = 56,594 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Is a Mercedes-Benz SLK ULEZ compliant?

An estimated 49.9% of Mercedes-Benz SLKs tested are likely ULEZ-compliant, judged from fuel type and first-use date; check a specific car with TfL's vehicle checker (2024).

Computed, not measured.

stacked · Mercedes-Benz SLK · Likely compliant · 49.9 vs baseline · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Likely compliant49.9% estimate202456594

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

What do six years of MOTs show about owning a Mercedes-Benz SLK?

Of failed Mercedes-Benz SLK MOTs, 33.0% were retested the same day and a further 62.2% within 10 days; the median failed car passed its retest after 1 day (2019–2024, n = 57,635).

bar · Mercedes-Benz SLK · Same-day retest · 33 vs failed initial tests · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Same-day retest33%failed initial tests2019–202457635
Retest within 10 days62.2%failed initial tests2019–202457635
Clean MOT streak38.4%observed chains2019–202459598
Repeat advisory26.4%observed chains2019–202459598
Decreasing odometer1.2% mileage anomalyobserved chains2019–202463110

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Is low mileage better for a Mercedes-Benz SLK?

Mercedes-Benz SLKs aged 5 to 14 doing under 5,000 miles a year failed first time in 14.0% of tests, against 28.0% for those doing 8,000 to 12,000 miles (2019–2024, n = 73,490).

bullet · Mercedes-Benz SLK · Low-use first-time failure · 14.0 vs 28.0 · 2019–2024
Low-use first-time failure: 14 vs 28. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Low-use first-time failure14.0%28.02019–202473490
Low-use gap-14.1percentage points8–12k miles2019–202473490

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

How many years is a Mercedes-Benz SLK likely to last?

Mercedes-Benz SLKs tend to last: at ten years old the typical one has about 9.5 more years of MOTs ahead, more than the median model. This is a forecast from the survival curve and may not come true.

Computed, not measured.

Forecast, not a prediction for a particular car.

bar · Mercedes-Benz SLK · Age 5 (at least; observed only until age 19) · 14.5 vs baseline · survival forecast
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (survival forecast)
MeasureValueUnitCompared withYearsTests
Age 5 (at least; observed only until age 19)14.5years forecastsurvival forecast0
Age 8 (at least; observed only until age 19)11.5years forecastsurvival forecast0
Age 10 (at least; observed only until age 19)9.5years forecastsurvival forecast0
Age 12 (at least; observed only until age 19)7.5years forecastsurvival forecast0
Age 15 (at least; observed only until age 19)4.5years forecastsurvival forecast0

Source: DVSA MOT bulk data · Window: survival forecast · n = 56,594 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz SLKs are still on the road?

In 2024, at least as many Mercedes-Benz SLKs were tested at age 19 as at ages 4 to 6 (2024, n = 14,422).

line · Mercedes-Benz SLK · Age 3 · 11 vs baseline · 2024
Age 3: 11. Age 19 (at least a: 100. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 311% of age 4–6 baseline20241199
Age 454% of age 4–6 baseline20245904
Age 5 (at least as many as at ages 4–6)100% of age 4–6 baseline202411162
Age 6 (at least as many as at ages 4–6)100% of age 4–6 baseline202415722
Age 7 (at least as many as at ages 4–6)100% of age 4–6 baseline202418416
Age 8 (at least as many as at ages 4–6)100% of age 4–6 baseline202418832
Age 9 (at least as many as at ages 4–6)100% of age 4–6 baseline202421220
Age 10 (at least as many as at ages 4–6)100% of age 4–6 baseline202419111
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 11 (at least as many as at ages 4–6)100% of age 4–6 baseline202416410
Age 12 (at least as many as at ages 4–6)100% of age 4–6 baseline202414317
Age 13 (at least as many as at ages 4–6)100% of age 4–6 baseline202412065
Age 14 (at least as many as at ages 4–6)100% of age 4–6 baseline202414480
Age 15 (at least as many as at ages 4–6)100% of age 4–6 baseline202416536
Age 16 (at least as many as at ages 4–6)100% of age 4–6 baseline202417597
Age 17 (at least as many as at ages 4–6)100% of age 4–6 baseline202417302
Age 18 (at least as many as at ages 4–6)100% of age 4–6 baseline202416227
Age 19 (at least as many as at ages 4–6)100% of age 4–6 baseline202414422

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

If a Mercedes-Benz SLK fails, does it fail again?

30% of Mercedes-Benz SLKs that failed an MOT failed the next one too, against 22% after a pass (2019–2024, n = 14,186). The failure most likely to come back is ‘noise, emissions and leaks’: 31.4% of those fails recurred at the next MOT.

bullet · Mercedes-Benz SLK · Repeat after fail · 30 vs 22 · 2019–2024
Repeat after fail: 30 vs 22. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Repeat after fail30%222019–202414186

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz SLK faults come together?

On Mercedes-Benz SLKs, ‘body, chassis, structure’ and ‘noise, emissions and leaks’ failures turn up together 9.9 times as often as chance would predict (2024, n = 751).

Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Body, chassis, structure + Noise, emissions and leaks9.9liftexpected joint rate2024751
Noise, emissions and leaks + Seat belts and supplementary restraint systems (rough estimate: 360 tests, 95% interval 5.7–7.0)6.3liftexpected joint rate2024360
Identification of the vehicle + Road Wheels (rough estimate: 21 tests, 95% interval 3.7–9.1)6.0liftexpected joint rate202421
Road Wheels + Seat belts and supplementary restraint systems (rough estimate: 59 tests, 95% interval 4.4–7.4)5.8liftexpected joint rate202459
Identification of the vehicle + Seat belts and supplementary restraint systems (rough estimate: 58 tests, 95% interval 4.3–7.3)5.7liftexpected joint rate202458
Body, chassis, structure + Seat belts and supplementary restraint systems (rough estimate: 208 tests, 95% interval 4.6–6.1)5.3liftexpected joint rate2024208
Noise, emissions and leaks + Road Wheels (rough estimate: 103 tests, 95% interval 4.3–6.3)5.2liftexpected joint rate2024103
Body, chassis, structure + Lamps, reflectors and electrical equipment5.2liftexpected joint rate20241514
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Body, chassis, structure + Brakes5.2liftexpected joint rate20241135
Brakes + Noise, emissions and leaks5.0liftexpected joint rate20241611
Lamps, reflectors and electrical equipment + Noise, emissions and leaks5.0liftexpected joint rate20242110
Body, chassis, structure + Steering (rough estimate: 237 tests, 95% interval 4.3–5.6)4.9liftexpected joint rate2024237
Lamps, reflectors and electrical equipment + Seat belts and supplementary restraint systems4.9liftexpected joint rate20241072
Body, chassis, structure + Identification of the vehicle (rough estimate: 64 tests, 95% interval 3.6–6.0)4.7liftexpected joint rate202464
Brakes + Seat belts and supplementary restraint systems4.6liftexpected joint rate2024770
Body, chassis, structure + Road Wheels (rough estimate: 62 tests, 95% interval 3.5–5.9)4.6liftexpected joint rate202462
Identification of the vehicle + Noise, emissions and leaks (rough estimate: 83 tests, 95% interval 3.4–5.2)4.2liftexpected joint rate202483
Lamps, reflectors and electrical equipment + Steering4.2liftexpected joint rate20241139
Identification of the vehicle + Lamps, reflectors and electrical equipment (rough estimate: 318 tests, 95% interval 3.8–4.7)4.2liftexpected joint rate2024318
Noise, emissions and leaks + Steering (rough estimate: 294 tests, 95% interval 3.7–4.7)4.2liftexpected joint rate2024294
Lamps, reflectors and electrical equipment + Road Wheels (rough estimate: 301 tests, 95% interval 3.5–4.4)4.0liftexpected joint rate2024301
Seat belts and supplementary restraint systems + Visibility3.8liftexpected joint rate2024561
Brakes + Lamps, reflectors and electrical equipment3.8liftexpected joint rate20244725
Identification of the vehicle + Visibility (rough estimate: 189 tests, 95% interval 3.2–4.3)3.8liftexpected joint rate2024189
Lamps, reflectors and electrical equipment + Visibility3.7liftexpected joint rate20244050
Brakes + Steering3.6liftexpected joint rate2024727
Body, chassis, structure + Visibility3.6liftexpected joint rate2024689
Seat belts and supplementary restraint systems + Steering (rough estimate: 129 tests, 95% interval 3.0–4.2)3.5liftexpected joint rate2024129
Road Wheels + Tyres (rough estimate: 226 tests, 95% interval 3.1–4.0)3.5liftexpected joint rate2024226
Brakes + Road Wheels (rough estimate: 201 tests, 95% interval 3.0–4.0)3.5liftexpected joint rate2024201
Brakes + Identification of the vehicle (rough estimate: 199 tests, 95% interval 3.0–4.0)3.5liftexpected joint rate2024199
Noise, emissions and leaks + Visibility3.4liftexpected joint rate2024967
Road Wheels + Visibility (rough estimate: 171 tests, 95% interval 2.9–3.9)3.4liftexpected joint rate2024171
Identification of the vehicle + Tyres (rough estimate: 212 tests, 95% interval 2.9–3.8)3.3liftexpected joint rate2024212
Seat belts and supplementary restraint systems + Suspension3.3liftexpected joint rate20241063
Brakes + Suspension3.1liftexpected joint rate20245633
Body, chassis, structure + Suspension3.0liftexpected joint rate20241312
Identification of the vehicle + Steering (rough estimate: 37 tests, 95% interval 2.1–4.1)3.0liftexpected joint rate202437
Noise, emissions and leaks + Suspension2.9liftexpected joint rate20241842
Brakes + Visibility2.9liftexpected joint rate20242386
Steering + Visibility2.8liftexpected joint rate2024506
Seat belts and supplementary restraint systems + Tyres2.8liftexpected joint rate2024520
Road Wheels + Steering (rough estimate: 35 tests, 95% interval 1.9–3.9)2.8liftexpected joint rate202435
Road Wheels + Suspension (rough estimate: 311 tests, 95% interval 2.5–3.1)2.8liftexpected joint rate2024311
Steering + Suspension2.6liftexpected joint rate20241056
Noise, emissions and leaks + Tyres2.6liftexpected joint rate2024948
Brakes + Tyres2.6liftexpected joint rate20242738
Body, chassis, structure + Tyres2.5liftexpected joint rate2024631
Lamps, reflectors and electrical equipment + Suspension2.5liftexpected joint rate20246136
Lamps, reflectors and electrical equipment + Tyres2.4liftexpected joint rate20243384
Identification of the vehicle + Suspension (rough estimate: 253 tests, 95% interval 2.0–2.6)2.3liftexpected joint rate2024253
Tyres + Visibility2.2liftexpected joint rate20241982
Suspension + Visibility2.0liftexpected joint rate20243260
Suspension + Tyres2liftexpected joint rate20244104
Steering + Tyres (rough estimate: 420 tests, 95% interval 1.7–2.0)1.8liftexpected joint rate2024420
Lamps, reflectors and electrical equipment + Speedometer and speed limiter (seen together; too few for a multiplier)15tests with both202415
Brakes + Speedometer and speed limiter (seen together; too few for a multiplier)5tests with both20245
Speedometer and speed limiter + Suspension (seen together; too few for a multiplier)5tests with both20245

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Has the Mercedes-Benz SLK had safety recalls?

DVSA lists 26 safety recall campaigns matched to the Mercedes-Benz SLK; check whether yours has been fixed, using its registration number.

Mercedes-Benz SLK: the numbers behind this answer (DVSA register)
MeasureValueUnitCompared withYearsTests
DVSA recall campaigns matched26campaignsDVSA registerDVSA register56594

Source: DVSA register; recall effect covers 11 of 761 models · Window: DVSA register · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

What does a Mercedes-Benz SLK cost to run in a fleet?

Of every 100 Mercedes-Benz SLKs tested at age 8, about 18 failed the MOT first time (rough estimate); at age 10, about 21. These are one-year rates for different cars tested in the same year, not a fleet followed over time; the steepest one-year step in this cross-section is between cars aged 13 and 14, 7.66 percentage points (2024).

Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 8 (rough estimate: 1,236 tests, 95% interval 16.1–20.4%)18.1% fail first time20241236
Age 919.5% fail first time20244851
Age 1021.4% fail first time20244825
Age 1124.9% fail first time20244526
Age 1225.7% fail first time20245529
Age 1322.9% fail first time20242501
Age 1430.6% fail first time20242081
Age 1529.4% fail first time20242459
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 1631.6% fail first time20243141
Age 1732.4% fail first time20243478
Age 1832.1% fail first time20243628
Age 1932.7% fail first time20244677

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

What have dealers been told about the Mercedes-Benz SLK? (US market)

NHTSA lists 158 US technical service bulletins for the Mercedes-Benz SLK (US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only); a count, not a UK failure rate.

bar · Mercedes-Benz SLK · US service bulletins · 158 vs NHTSA · NHTSA
NHTSA, US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only; covers 211 of 761 models, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (NHTSA)
MeasureValueUnitCompared withYearsTests
US service bulletins158bulletinsNHTSANHTSA56594
Year 201320bulletinsNHTSANHTSA56594
Year 201420bulletinsNHTSANHTSA56594
Year 20155bulletinsNHTSANHTSA56594
Year 201610bulletinsNHTSANHTSA56594
Year 201712bulletinsNHTSANHTSA56594
Year 20186bulletinsNHTSANHTSA56594
Year 20195bulletinsNHTSANHTSA56594
Full table
Further values · NHTSA
MeasureValueUnitCompared withYearsTests
Year 20205bulletinsNHTSANHTSA56594
Year 20217bulletinsNHTSANHTSA56594
Year 20236bulletinsNHTSANHTSA56594
Year 202421bulletinsNHTSANHTSA56594
Year 202522bulletinsNHTSANHTSA56594
Year 202619bulletinsNHTSANHTSA56594

Source: NHTSA, US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only; covers 211 of 761 models · Window: NHTSA · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

What do owners complain about? (US market)

The most common US owner complaint about the Mercedes-Benz SLK to NHTSA concerns body & structure: 2 complaints (US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only).

bar · Mercedes-Benz SLK · Body &amp; structure · 2 vs baseline · NHTSA + 2024
NHTSA, US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only; covers 211 of 761 models, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (NHTSA + 2024)
MeasureValueUnitCompared withYearsTests
Body & structure2complaintsNHTSA + 20242
Brakes1complaintsNHTSA + 20241

Source: NHTSA, US market, Mercedes-Benz SLK-CLASS, model years 2015–2016 only; covers 211 of 761 models · Window: NHTSA + 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does the Mercedes-Benz SLK fail inspections in other countries too?

In the Netherlands, 51.0% of Mercedes-Benz SLKs failed their periodic roadworthiness inspection, against 50.8% for all cars there (2024 by country, n = 8,551 inspections).

Both readings are shown: this comparison changes when usage or inspection rules differ.

Inspections abroad disagree: Finland point the same way as Britain, Norway and the Netherlands do not. Test rules, climate and how the vehicles are used differ, so both readings are shown.

bullet · Mercedes-Benz SLK · Norway · 36.9 vs 33.7 · 2024 by country
Norway: 36.9 vs 33.7. Finland: 21.3 vs 26.3. Netherlands: 51 vs 50.8. Statens vegvesen PKK (CC BY 4.0), Traficom Katsastus (CC BY 4.0), RDW APK (CC0), adapted; covers 430 of 761 models, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024 by country)
MeasureValueUnitCompared withYearsTests
Norway36.9% failed33.72024 by country966
Finland21.3% failed26.32024 by country1252
Netherlands51% failed50.82024 by country8551

Source: Statens vegvesen PKK (CC BY 4.0), Traficom Katsastus (CC BY 4.0), RDW APK (CC0), adapted; covers 430 of 761 models · Window: 2024 by country · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV · licences and full notice

Does the month of a Mercedes-Benz SLK MOT matter?

Mercedes-Benz SLKs fail first time most in April (26.8%, against 29.8% for all cars that month) and least in March (24.7%) (2024, n = 56,594).

line · Mercedes-Benz SLK · January · 25.8 vs 31.1 · 2024
January: 25.8. December: 25.5. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz SLK: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
January25.8% fail first time31.1202423720
February24.9% fail first time30.0202423726
March24.7% fail first time28.3202430347
April26.8% fail first time29.8202421474
May26.8% fail first time28.8202423624
June25.5% fail first time28.1202426762
July25.8% fail first time29.3202426976
August25.8% fail first time29.2202426694
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
September25.2% fail first time28.2202427440
October26.3% fail first time30.3202427313
November26.0% fail first time30.6202424594
December25.5% fail first time29.3202416370

Source: DVSA MOT bulk data · Window: 2024 · n = 56,594 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Not enough tests for… (and why)

Real-world MPG against the official figure (manufacturer level)

layer not yet computed for this model (covers 19 of 761 models). 56,594 initial Mercedes-Benz SLK tests are in the published model cohort.

Source: European Commission OBFCM; covers 19 of 761 models · Window: 2021+ cohorts · n = 56,594 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

See the Mercedes-Benz E-Class, a car of the same inspection class with 4.0× the tests · Check your car by registration

How to cite this page

MOT Risk Index (2026). Mercedes-Benz SLK MOT statistics 2024 (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 24 September 2026. motriskindex.co.uk/cars/mercedes-slk/

How the MOT Risk Index and every figure on this page are calculated: methodology.

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Mercedes-Benz SLK MOT: quick answers

What is the Mercedes-Benz SLK first-time MOT pass rate?

71.8% of first attempts passed in 2024 (56,594 tests). Retests after repair are excluded; cars fixed at the test centre (PRS) are shown separately.

Why does this number differ from other sites?

Other sites may count retests or all attempts. This page uses 56,594 primary tests: 28.18% failed first time and 75.5% passed when cars fixed at the test centre (PRS) count as passes. The age-adjusted MOT Risk Index 75.2 is shown separately.