MOT Risk Index.co.uk

Mercedes-Benz Viano MOT pass rate and common problems

71.5% of Mercedes-Benz Vianos passed the 2024 MOT (5,332 first tests): 65.3% at the first attempt and 6.3% after a fix at the test centre (PRS), each rounded separately. About 1 in 3 failed the first attempt. For its age, it fails 9% less often than normal: MOT Risk Index 91.4 (95% CI 88.1–94.8; 100 = normal).

Mercedes-Benz Viano at a glance, 2024 MOT
MeasureValueUnitCompared withYearsTests
MOT pass rate71.5%incl. 6.3% fixed at the test centre20245332
Passed at the first attempt65.3%all first tests20245332
MOT Risk Index (95% CI 88.1–94.8)91.4index100 = normal for its age · rank 361 (tied) of 761 (1 = fails least for its age)20245332
Biggest excess: Lamps, reflectors and electrical equipment29.0per 10023.8 same-age2019–202432805
Dangerous defects12.9per 10011.2 UK, not age-adjusted2019–202432805
Advisory items148.0per 100127.1 UK, not age-adjusted2019–202432805
strip · Mercedes-Benz Viano · MOT Risk Index · 91.4 vs 100 = normal · 2024
MOT Risk Index · Mercedes-Benz Viano. 0–240; 100 = normal for its age; median model 92.8 · rank 361 (tied) of 761 (1 = fails least for its age). It would rank between 335 and 395 anywhere within its 95% interval, other models held where they are. DVSA, 2024.
Mercedes-Benz Viano index position among 761 models
MeasureValueUnitCompared withYearsTests
Rank361of 761published models, 1 = fails least for its age20245332
Best rank within its 95% interval335rankother models held where they are20245332
Worst rank within its 95% interval395rankother models held where they are20245332

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Data release dvsa-2024-v2 (24 Sep 2026) · full dataset (v5). This model's index changed from 86.9 to 91.4 in the 24 September 2026 release, after duplicate test records were removed.

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

Mercedes-Benz Viano MOTs fail most often on ‘lamps, reflectors and electrical equipment’: 29 per 100 tests, against 23.8 for UK cars of the same age (2019–2024, n = 32,805).

bar · Mercedes-Benz Viano · Lamps, reflectors and electrical equipment · 29 vs 23.8 · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Lamps, reflectors and electrical equipment29per 10023.82019–20249526
Brakes19.9per 10015.02019–20246524
Suspension15per 10020.92019–20244930
Visibility11.2per 1009.12019–20243687
Tyres9per 1009.92019–20242952
Body, chassis, structure6.1per 1007.52019–20242014

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 32,805 (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 Viano compare with cars of the same age?

The biggest excess for the Mercedes-Benz Viano is brakes at age 8: 10 failures per 100 tests, against 5.4 for same-age cars of comparable models (2019–2024, n = 2,510).

bullet · Mercedes-Benz Viano · Tyres, age 5 · 5.8 vs 5.1 · 2019–2024
Tyres, age 5: 5.8 vs 5.1. Brakes, age 5: 6.2 vs 3.1. Suspension, age 5: 2.7 vs 2.2. Tyres, age 6: 5.8 vs 5.5. Brakes, age 6: 7.1 vs 3.8. Suspension, age 6: 2.4 vs 3.7. Tyres, age 7: 5.9 vs 6.0. Brakes, age 7: 8.2 vs 4.5. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Tyres, age 55.8per 1005.12019–2024878
Brakes, age 56.2per 1003.12019–2024878
Suspension, age 52.7per 1002.22019–2024878
Tyres, age 65.8per 1005.52019–20241399
Brakes, age 67.1per 1003.82019–20241399
Suspension, age 62.4per 1003.72019–20241399
Tyres, age 75.9per 1006.02019–20242070
Brakes, age 78.2per 1004.52019–20242070
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Suspension, age 73.2per 1005.72019–20242070
Tyres, age 86.4per 1006.32019–20242510
Brakes, age 810per 1005.42019–20242510
Suspension, age 83.9per 1007.82019–20242510

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

Mercedes-Benz Viano advisories turn into fails more often than on the median model: lamps, reflectors and electrical equipment advisories became a fail at the next MOT 27.9% of the time.

funnel · Mercedes-Benz Viano · Lamps, reflectors and electrical equipment · 27.9 vs median model · 2019–2024
Advisories on lamps, reflectors and electrical equipment: 27.9 of 100 became a fail on the same item at the next MOT. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Lamps, reflectors and electrical equipment27.9% next failmedian model2019–20241288
Brakes16.7% next failmedian model2019–20245997
Suspension15.6% next failmedian model2019–20243690
Body, chassis, structure9.5% next failmedian model2019–20241584
Steering9.2% next failmedian model2019–2024666
Tyres9.0% next failmedian model2019–20246050
Noise, emissions and leaks6.1% next failmedian model2019–20241937
Non-component advisories0% next failmedian model2019–20241987

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

Mercedes-Benz Viano MOTs flag brakes most: 42.5 advisories per 100 tests, against 34.7 across UK tests (2019–2024, n = 32,805).

bar · Mercedes-Benz Viano · Brakes · 42.5 vs 34.7 · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Brakes42.5per 10034.72019–202413943
Tyres38.3per 10039.72019–202412564
Suspension25.9per 10026.22019–20248498
Non-component advisories9.3per 1007.82019–20243066
Body, chassis, structure9.1per 1004.62019–20242977
Noise, emissions and leaks8.9per 1005.22019–20242921

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 32,805 (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 Viano?

For Mercedes-Benz Vianos aged 6 to 8 whose last MOT was a pass, the item most likely to fail at the next MOT is ‘lamps, reflectors and electrical equipment’: 9.3% failed on it (2019–2024, n = 2,932).

bar · Mercedes-Benz Viano · Lamps, reflectors and electrical equipment, under 3 years old, after a pass (rough estimate: 55 cars) · 12.7 vs baseline · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Lamps, reflectors and electrical equipment, under 3 years old, after a pass (rough estimate: 55 cars)12.7% next fail2019–202455
Lamps, reflectors and electrical equipment, 3 to 5 years old, after a pass9.4% next fail2019–2024931
Visibility, 3 to 5 years old, after a pass6.4% next fail2019–2024931
Brakes, 3 to 5 years old, after a pass6.1% next fail2019–2024931
Tyres, 3 to 5 years old, after a pass6.1% next fail2019–2024931
Suspension, 3 to 5 years old, after a pass2.9% next fail2019–2024931
Noise, emissions and leaks, 3 to 5 years old, after a pass2.4% next fail2019–2024931
Steering, 3 to 5 years old, after a pass1.2% next fail2019–2024931
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Body, chassis, structure, 3 to 5 years old, after a pass1.1% next fail2019–2024931
Seat belts and supplementary restraint systems, 3 to 5 years old, after a pass0.8% next fail2019–2024931
Lamps, reflectors and electrical equipment, 3 to 5 years old, after an advisory (rough estimate: 427 cars)9.4% next fail2019–2024427
Visibility, 3 to 5 years old, after an advisory (rough estimate: 427 cars)7.5% next fail2019–2024427
Tyres, 3 to 5 years old, after an advisory (rough estimate: 427 cars)6.1% next fail2019–2024427
Brakes, 3 to 5 years old, after an advisory (rough estimate: 427 cars)4.9% next fail2019–2024427
Suspension, 3 to 5 years old, after an advisory (rough estimate: 427 cars)4.2% next fail2019–2024427
Noise, emissions and leaks, 3 to 5 years old, after an advisory (rough estimate: 427 cars)2.8% next fail2019–2024427
Body, chassis, structure, 3 to 5 years old, after an advisory (rough estimate: 427 cars)1.9% next fail2019–2024427
Seat belts and supplementary restraint systems, 3 to 5 years old, after an advisory (rough estimate: 427 cars)1.6% next fail2019–2024427
Steering, 3 to 5 years old, after an advisory (rough estimate: 427 cars)1.6% next fail2019–2024427
Lamps, reflectors and electrical equipment, 3 to 5 years old, after a fail (rough estimate: 441 cars)14.7% next fail2019–2024441
Brakes, 3 to 5 years old, after a fail (rough estimate: 441 cars)10.4% next fail2019–2024441
Visibility, 3 to 5 years old, after a fail (rough estimate: 441 cars)9.1% next fail2019–2024441
Tyres, 3 to 5 years old, after a fail (rough estimate: 441 cars)7.3% next fail2019–2024441
Noise, emissions and leaks, 3 to 5 years old, after a fail (rough estimate: 441 cars)5.9% next fail2019–2024441
Suspension, 3 to 5 years old, after a fail (rough estimate: 441 cars)5.2% next fail2019–2024441
Body, chassis, structure, 3 to 5 years old, after a fail (rough estimate: 441 cars)4.1% next fail2019–2024441
Seat belts and supplementary restraint systems, 3 to 5 years old, after a fail (rough estimate: 441 cars)2.9% next fail2019–2024441
Steering, 3 to 5 years old, after a fail (rough estimate: 441 cars)1.6% next fail2019–2024441
Lamps, reflectors and electrical equipment, 6 to 8 years old, after a pass9.3% next fail2019–20242932
Brakes, 6 to 8 years old, after a pass6.7% next fail2019–20242932
Visibility, 6 to 8 years old, after a pass5.9% next fail2019–20242932
Tyres, 6 to 8 years old, after a pass4.9% next fail2019–20242932
Suspension, 6 to 8 years old, after a pass3.2% next fail2019–20242932
Noise, emissions and leaks, 6 to 8 years old, after a pass2.9% next fail2019–20242932
Body, chassis, structure, 6 to 8 years old, after a pass2.0% next fail2019–20242932
Seat belts and supplementary restraint systems, 6 to 8 years old, after a pass1.5% next fail2019–20242932
Steering, 6 to 8 years old, after a pass1.1% next fail2019–20242932
Road wheels, 6 to 8 years old, after a pass0.4% next fail2019–20242932
Lamps, reflectors and electrical equipment, 6 to 8 years old, after an advisory13.4% next fail2019–20241676
Brakes, 6 to 8 years old, after an advisory10.0% next fail2019–20241676
Visibility, 6 to 8 years old, after an advisory8.4% next fail2019–20241676
Tyres, 6 to 8 years old, after an advisory6.1% next fail2019–20241676
Suspension, 6 to 8 years old, after an advisory5.3% next fail2019–20241676
Noise, emissions and leaks, 6 to 8 years old, after an advisory4.1% next fail2019–20241676
Body, chassis, structure, 6 to 8 years old, after an advisory2.0% next fail2019–20241676
Seat belts and supplementary restraint systems, 6 to 8 years old, after an advisory1.8% next fail2019–20241676
Steering, 6 to 8 years old, after an advisory1.8% next fail2019–20241676
Road wheels, 6 to 8 years old, after an advisory0.6% next fail2019–20241676
Identification of the vehicle, 6 to 8 years old, after an advisory0.4% next fail2019–20241676
Lamps, reflectors and electrical equipment, 6 to 8 years old, after a fail17.5% next fail2019–20241924
Brakes, 6 to 8 years old, after a fail13.9% next fail2019–20241924
Visibility, 6 to 8 years old, after a fail9.8% next fail2019–20241924
Tyres, 6 to 8 years old, after a fail8.5% next fail2019–20241924
Suspension, 6 to 8 years old, after a fail7.0% next fail2019–20241924
Noise, emissions and leaks, 6 to 8 years old, after a fail6.1% next fail2019–20241924
Seat belts and supplementary restraint systems, 6 to 8 years old, after a fail3.5% next fail2019–20241924
Body, chassis, structure, 6 to 8 years old, after a fail2.9% next fail2019–20241924
Steering, 6 to 8 years old, after a fail2.0% next fail2019–20241924
Road wheels, 6 to 8 years old, after a fail0.7% next fail2019–20241924
Identification of the vehicle, 6 to 8 years old, after a fail0.6% next fail2019–20241924
Lamps, reflectors and electrical equipment, 9 to 11 years old, after a pass12.3% next fail2019–20242732
Brakes, 9 to 11 years old, after a pass7.5% next fail2019–20242732
Suspension, 9 to 11 years old, after a pass6.4% next fail2019–20242732
Visibility, 9 to 11 years old, after a pass6.0% next fail2019–20242732
Tyres, 9 to 11 years old, after a pass3.4% next fail2019–20242732
Body, chassis, structure, 9 to 11 years old, after a pass2.4% next fail2019–20242732
Seat belts and supplementary restraint systems, 9 to 11 years old, after a pass2.0% next fail2019–20242732
Noise, emissions and leaks, 9 to 11 years old, after a pass2.0% next fail2019–20242732
Steering, 9 to 11 years old, after a pass1.7% next fail2019–20242732
Identification of the vehicle, 9 to 11 years old, after a pass0.4% next fail2019–20242732
Road wheels, 9 to 11 years old, after a pass0.2% next fail2019–20242732
Lamps, reflectors and electrical equipment, 9 to 11 years old, after an advisory19.0% next fail2019–20242057
Brakes, 9 to 11 years old, after an advisory12.2% next fail2019–20242057
Visibility, 9 to 11 years old, after an advisory10.7% next fail2019–20242057
Suspension, 9 to 11 years old, after an advisory10.3% next fail2019–20242057
Tyres, 9 to 11 years old, after an advisory6.8% next fail2019–20242057
Body, chassis, structure, 9 to 11 years old, after an advisory4.0% next fail2019–20242057
Noise, emissions and leaks, 9 to 11 years old, after an advisory3.7% next fail2019–20242057
Seat belts and supplementary restraint systems, 9 to 11 years old, after an advisory3.7% next fail2019–20242057
Steering, 9 to 11 years old, after an advisory2.5% next fail2019–20242057
Identification of the vehicle, 9 to 11 years old, after an advisory0.4% next fail2019–20242057
Road wheels, 9 to 11 years old, after an advisory0.4% next fail2019–20242057
Lamps, reflectors and electrical equipment, 9 to 11 years old, after a fail19.5% next fail2019–20242426
Brakes, 9 to 11 years old, after a fail15.7% next fail2019–20242426
Visibility, 9 to 11 years old, after a fail11.7% next fail2019–20242426
Suspension, 9 to 11 years old, after a fail11.4% next fail2019–20242426
Tyres, 9 to 11 years old, after a fail8.2% next fail2019–20242426
Noise, emissions and leaks, 9 to 11 years old, after a fail5.7% next fail2019–20242426
Body, chassis, structure, 9 to 11 years old, after a fail4.9% next fail2019–20242426
Seat belts and supplementary restraint systems, 9 to 11 years old, after a fail4.2% next fail2019–20242426
Steering, 9 to 11 years old, after a fail2.8% next fail2019–20242426
Road wheels, 9 to 11 years old, after a fail0.6% next fail2019–20242426
Identification of the vehicle, 9 to 11 years old, after a fail0.5% next fail2019–20242426
Lamps, reflectors and electrical equipment, 12 to 14 years old, after a pass13.8% next fail2019–20241921
Suspension, 12 to 14 years old, after a pass10.0% next fail2019–20241921
Brakes, 12 to 14 years old, after a pass9.5% next fail2019–20241921
Visibility, 12 to 14 years old, after a pass7.6% next fail2019–20241921
Tyres, 12 to 14 years old, after a pass4.5% next fail2019–20241921
Body, chassis, structure, 12 to 14 years old, after a pass3.3% next fail2019–20241921
Seat belts and supplementary restraint systems, 12 to 14 years old, after a pass2.8% next fail2019–20241921
Steering, 12 to 14 years old, after a pass2.6% next fail2019–20241921
Noise, emissions and leaks, 12 to 14 years old, after a pass1.9% next fail2019–20241921
Identification of the vehicle, 12 to 14 years old, after a pass0.4% next fail2019–20241921
Road wheels, 12 to 14 years old, after a pass0.3% next fail2019–20241921
Lamps, reflectors and electrical equipment, 12 to 14 years old, after an advisory20.6% next fail2019–20241935
Suspension, 12 to 14 years old, after an advisory13.5% next fail2019–20241935
Brakes, 12 to 14 years old, after an advisory13.1% next fail2019–20241935
Visibility, 12 to 14 years old, after an advisory12.5% next fail2019–20241935
Tyres, 12 to 14 years old, after an advisory6.6% next fail2019–20241935
Body, chassis, structure, 12 to 14 years old, after an advisory4.8% next fail2019–20241935
Noise, emissions and leaks, 12 to 14 years old, after an advisory3.3% next fail2019–20241935
Seat belts and supplementary restraint systems, 12 to 14 years old, after an advisory3.1% next fail2019–20241935
Steering, 12 to 14 years old, after an advisory2.9% next fail2019–20241935
Road wheels, 12 to 14 years old, after an advisory0.7% next fail2019–20241935
Identification of the vehicle, 12 to 14 years old, after an advisory0.6% next fail2019–20241935
Lamps, reflectors and electrical equipment, 12 to 14 years old, after a fail24.4% next fail2019–20242333
Suspension, 12 to 14 years old, after a fail16.9% next fail2019–20242333
Brakes, 12 to 14 years old, after a fail16.5% next fail2019–20242333
Visibility, 12 to 14 years old, after a fail12.9% next fail2019–20242333
Tyres, 12 to 14 years old, after a fail8.3% next fail2019–20242333
Body, chassis, structure, 12 to 14 years old, after a fail8.1% next fail2019–20242333
Seat belts and supplementary restraint systems, 12 to 14 years old, after a fail6.2% next fail2019–20242333
Noise, emissions and leaks, 12 to 14 years old, after a fail5.3% next fail2019–20242333
Steering, 12 to 14 years old, after a fail4.5% next fail2019–20242333
Identification of the vehicle, 12 to 14 years old, after a fail0.6% next fail2019–20242333
Road wheels, 12 to 14 years old, after a fail0.3% next fail2019–20242333
Lamps, reflectors and electrical equipment, 15 to 19 years old, after a pass14.4% next fail2019–20241278
Suspension, 15 to 19 years old, after a pass9.6% next fail2019–20241278
Visibility, 15 to 19 years old, after a pass7.9% next fail2019–20241278
Brakes, 15 to 19 years old, after a pass7.8% next fail2019–20241278
Body, chassis, structure, 15 to 19 years old, after a pass6.0% next fail2019–20241278
Seat belts and supplementary restraint systems, 15 to 19 years old, after a pass3.5% next fail2019–20241278
Steering, 15 to 19 years old, after a pass3.4% next fail2019–20241278
Tyres, 15 to 19 years old, after a pass3.2% next fail2019–20241278
Noise, emissions and leaks, 15 to 19 years old, after a pass1.6% next fail2019–20241278
Identification of the vehicle, 15 to 19 years old, after a pass0.5% next fail2019–20241278
Lamps, reflectors and electrical equipment, 15 to 19 years old, after an advisory23.7% next fail2019–20241398
Suspension, 15 to 19 years old, after an advisory17.8% next fail2019–20241398
Brakes, 15 to 19 years old, after an advisory15.0% next fail2019–20241398
Visibility, 15 to 19 years old, after an advisory11.3% next fail2019–20241398
Body, chassis, structure, 15 to 19 years old, after an advisory8.6% next fail2019–20241398
Tyres, 15 to 19 years old, after an advisory5.3% next fail2019–20241398
Steering, 15 to 19 years old, after an advisory5.0% next fail2019–20241398
Seat belts and supplementary restraint systems, 15 to 19 years old, after an advisory4.9% next fail2019–20241398
Noise, emissions and leaks, 15 to 19 years old, after an advisory3% next fail2019–20241398
Road wheels, 15 to 19 years old, after an advisory0.6% next fail2019–20241398
Identification of the vehicle, 15 to 19 years old, after an advisory0.6% next fail2019–20241398
Lamps, reflectors and electrical equipment, 15 to 19 years old, after a fail29.3% next fail2019–20241781
Suspension, 15 to 19 years old, after a fail18.8% next fail2019–20241781
Brakes, 15 to 19 years old, after a fail17.9% next fail2019–20241781
Visibility, 15 to 19 years old, after a fail14.0% next fail2019–20241781
Body, chassis, structure, 15 to 19 years old, after a fail10.4% next fail2019–20241781
Seat belts and supplementary restraint systems, 15 to 19 years old, after a fail8.6% next fail2019–20241781
Tyres, 15 to 19 years old, after a fail8.6% next fail2019–20241781
Steering, 15 to 19 years old, after a fail7.3% next fail2019–20241781
Noise, emissions and leaks, 15 to 19 years old, after a fail4.0% next fail2019–20241781
Road wheels, 15 to 19 years old, after a fail0.8% next fail2019–20241781
Identification of the vehicle, 15 to 19 years old, after a fail0.6% next fail2019–20241781

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

The Mercedes-Benz Viano gets a dangerous defect more often than the UK average: 12.9 per 100 first tests against 11.2 across the UK. A dangerous defect means the vehicle should not be driven away until it is fixed. In the same tests, 70.9 major and 18.9 minor defects were recorded per 100 tests (one test can record several).

bullet · Mercedes-Benz Viano · Dangerous defects · 12.9 vs 11.2 · 2019–2024
Dangerous defects: 12.9 vs 11.2. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Dangerous defects12.9per 10011.22019–202432805

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 32,805 (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 Viano still pass its MOT in a few years?

First-time MOT failures for the Mercedes-Benz Viano go from 26.3% at age 9 (rough estimate: 137 tests, 95% interval 19.6–34.2%) to 43.0% at age 19 (rough estimate: 344 tests, 95% interval 37.9–48.3%), against 43.5% for all cars aged 19 (rough estimate: 344 tests, 95% interval 37.9–48.3%) (2024, n = 5,332).

line · Mercedes-Benz Viano · Age 9 (rough estimate: 137 tests, 95% interval 19.6–34.2%) · 26.3 vs 26.5 · 2024
Age 9 (rough estim: 26.3. Age 19 (rough esti: 43.0. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 9 (rough estimate: 137 tests, 95% interval 19.6–34.2%)26.3% failed first time26.52024137
Age 1027.9% failed first time30.12024650
Age 1131.3% failed first time33.22024643
Age 1231.8% failed first time35.72024569
Age 13 (rough estimate: 485 tests, 95% interval 31.9–40.5%)36.1% failed first time38.22024485
Age 14 (rough estimate: 423 tests, 95% interval 29.0–38.0%)33.3% failed first time40.42024423
Age 15 (rough estimate: 429 tests, 95% interval 32.9–42.0%)37.3% failed first time41.62024429
Age 16 (rough estimate: 477 tests, 95% interval 32.5–41.1%)36.7% failed first time43.12024477
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 17 (rough estimate: 440 tests, 95% interval 36.0–45.1%)40.5% failed first time43.12024440
Age 18 (rough estimate: 354 tests, 95% interval 39.5–49.8%)44.6% failed first time43.92024354
Age 19 (rough estimate: 344 tests, 95% interval 37.9–48.3%)43.0% failed first time43.52024344

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

At every age shown, Mercedes-Benz Vianos fail first time more often than comparable models of the same size class; the biggest difference is at age 4, where they fail more often: 29.7% against 12.3% (2024, n = 239).

line · Mercedes-Benz Viano · Age 4 · 29.7 vs 12.3 · 2024
Age 4: 29.7. Age 20: 37.8. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 429.7% fail12.32024239
Age 523.4% fail14.22024878
Age 626.0% fail16.120241399
Age 729.6% fail18.220242070
Age 830.5% fail20.520242510
Age 930.7% fail23.120242948
Age 1032.3% fail25.620243227
Age 1133.0% fail28.220242989
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 1235.9% fail30.520242830
Age 1337.0% fail32.620242676
Age 1437.8% fail34.620242606
Age 1538.2% fail36.020242482
Age 1639.7% fail37.120242035
Age 1740.8% fail37.520241585
Age 1841.8% fail37.820241125
Age 1940.4% fail37.42024654
Age 2037.8% fail37.02024238

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz Viano years should I avoid?

Mercedes-Benz Viano build years range from index 97.6 to 112.2 against the model's own age norm of 100 (2019–2024, n = 5,332).

No Mercedes-Benz Viano build year stands out once age is allowed for; every year's interval includes normal.

bar · Mercedes-Benz Viano · Build year 2004 (rough estimate: 1,137 tests, 95% interval 95.8–114.6) · 105.2 vs 100 = normal · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Build year 2004 (rough estimate: 1,137 tests, 95% interval 95.8–114.6)105.2index vs own age100 = normal2019–20241137
Build year 2005 (rough estimate: 1,942 tests, 95% interval 95.3–109.6)102.5index vs own age100 = normal2019–20241942
Build year 2006 (rough estimate: 2,273 tests, 95% interval 96.3–109.7)103index vs own age100 = normal2019–20242273
Build year 2007 (rough estimate: 2,678 tests, 95% interval 95.3–107.7)101.5index vs own age100 = normal2019–20242678
Build year 2008 (rough estimate: 2,914 tests, 95% interval 99.3–111.7)105.5index vs own age100 = normal2019–20242914
Build year 2009 (rough estimate: 2,629 tests, 95% interval 96.6–109.8)103.2index vs own age100 = normal2019–20242629
Build year 2010 (rough estimate: 2,595 tests, 95% interval 93.6–106.8)100.2index vs own age100 = normal2019–20242595
Build year 2011 (rough estimate: 2,848 tests, 95% interval 99.2–112.4)105.8index vs own age100 = normal2019–20242848
Full table
Further values · 2019–2024
MeasureValueUnitCompared withYearsTests
Build year 2012 (rough estimate: 3,523 tests, 95% interval 91.8–103.4)97.6index vs own age100 = normal2019–20243523
Build year 2013 (rough estimate: 3,991 tests, 95% interval 93.4–104.7)99index vs own age100 = normal2019–20243991
Build year 201498index vs own age100 = normal2019–20244000
Build year 2015 (rough estimate: 723 tests, 95% interval 97.3–127.1)112.2index vs own age100 = normal2019–2024723

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (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 Viano MOT fail?

Expected repair cost per Mercedes-Benz Viano MOT: about £106 (up to about £201 if more expensive parts are needed), from the chance of failing each item and its most common UK repair price (catalogue estimate, n = 5,332).

Computed, not measured.

bar · Mercedes-Benz Viano · Expected repair bill · 105.5 vs modal price catalogue · price catalogue
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (price catalogue)
MeasureValueUnitCompared withYearsTests
Expected repair bill105.5GBP estimatemodal price catalogueprice catalogue5332
Estimated range lower105.5GBP estimatemodal price catalogueprice catalogue5332
Estimated range upper200.5GBP estimatemodal price catalogueprice catalogue5332
Lamps, reflectors and electrical equipment: Battery replacement (standard 12V lead-acid)40.6GBP expected contribution140price catalogue5332
Brakes: Front brake pads (parts + labour, typical hatchback)29.9GBP expected contribution150price catalogue5332
Suspension: Suspension coil spring (single corner)27GBP expected contribution180price catalogue5332
Tyres: Tyre (single mid-range 16" fitted)8.1GBP expected contribution90price catalogue5332

Source: DVSA MOT bulk data · Window: price catalogue · n = 5,332 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

Of 8 similar models, 5 fail less often for their age than the Mercedes-Benz Viano and 3 as often or more. The Mercedes-Benz Viano has an MOT Risk Index of 91.4, where 100 = normal for its age (2024, n = 5,332).

bar · Mercedes-Benz Viano · Mercedes-Benz Viano (this model) · 91.4 vs 100 = normal · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Mercedes-Benz Viano (this model)91.4index100 = normal20245332
Mercedes-Benz V-Class99.9index91.4202410642
Jeep Wrangler94.2index91.420247038
Subaru Outback87.6index91.420247550
Jaguar S-Type91index91.4202411255
Mercedes-Benz CLK90index91.4202428446
Saab 9-586.2index91.420247998
Nissan Elgrand92.8index91.4202413301
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Volvo S8082.8index91.420247070

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (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 Viano normally do?

At age 11, the median Mercedes-Benz Viano had covered 125,182 miles by its MOT; the middle half ranged from 84,304 to 178,993 miles (2024, n = 643).

line · Mercedes-Benz Viano · Age 9 median (rough estimate) · 113765 vs baseline · 2024
Age 9 median (roug: 113765. Age 19 P75 (rough : 194385. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 9 median (rough estimate)113765miles2024137
Age 9 P25 (rough estimate)68992miles2024137
Age 9 P75 (rough estimate)180109miles2024137
Age 10 median122476miles2024650
Age 10 P2584174miles2024650
Age 10 P75174271miles2024650
Age 11 median125182miles2024643
Age 11 P2584304miles2024643
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 11 P75178993miles2024643
Age 12 median138856miles2024569
Age 12 P2590319miles2024569
Age 12 P75195818miles2024569
Age 13 median (rough estimate)148217miles2024485
Age 13 P25 (rough estimate)96622miles2024485
Age 13 P75 (rough estimate)199993miles2024485
Age 14 median (rough estimate)144986miles2024423
Age 14 P25 (rough estimate)101992miles2024423
Age 14 P75 (rough estimate)200653miles2024423
Age 15 median (rough estimate)148365miles2024429
Age 15 P25 (rough estimate)101078miles2024429
Age 15 P75 (rough estimate)206596miles2024429
Age 16 median (rough estimate)144646miles2024477
Age 16 P25 (rough estimate)103907miles2024477
Age 16 P75 (rough estimate)197421miles2024477
Age 17 median (rough estimate)157301miles2024440
Age 17 P25 (rough estimate)112334miles2024440
Age 17 P75 (rough estimate)204023miles2024440
Age 18 median (rough estimate)143621miles2024354
Age 18 P25 (rough estimate)102772miles2024354
Age 18 P75 (rough estimate)204355miles2024354
Age 19 median (rough estimate)149492miles2024344
Age 19 P25 (rough estimate)96111miles2024344
Age 19 P75 (rough estimate)194385miles2024344

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (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 Viano MOT failures at the same age?

At ages 10–14, 21.1% of Mercedes-Benz Vianos with under 40,000 miles failed first time, against 33.0% of those with over 140,000 miles (2024, n = 1,382). No clear mileage gap inside this age group, among cars still being tested.

bar · Mercedes-Benz Viano · Age 10–14, <40k miles (rough estimate: 90 tests, 95% interval 14–30.6%) · 21.1 vs baseline · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 10–14, <40k miles (rough estimate: 90 tests, 95% interval 14–30.6%)21.1% failed first time202490
Age 10–14, 40-70k miles (rough estimate: 294 tests, 95% interval 22.1–32.2%)26.9% failed first time2024294
Age 10–14, 70-100k miles (rough estimate: 461 tests, 95% interval 23.9–32%)27.8% failed first time2024461
Age 10–14, 100-140k miles36% failed first time2024627
Age 10–14, 140k+ miles33% failed first time20241292
Age 15+, 40-70k miles (rough estimate: 215 tests, 95% interval 28.4–41%)34.4% failed first time2024215
Age 15+, 70-100k miles (rough estimate: 279 tests, 95% interval 32.8–44.2%)38.4% failed first time2024279
Age 15+, 100-140k miles (rough estimate: 477 tests, 95% interval 35.9–44.7%)40.3% failed first time2024477
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 15+, 140k+ miles40.8% failed first time20241174

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (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 Viano last?

64.6% of Mercedes-Benz Vianos tested had reached 100,000 miles, and 38.1% had reached 150,000 (2024, n = 20,909).

line · Mercedes-Benz Viano · 100,000 miles · 64.6 vs baseline · 2024
100,000 miles: 64.6. 200,000 miles: 19.7. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
100,000 miles64.6% of tested cars202420909
150,000 miles38.1% of tested cars202412325
200,000 miles19.7% of tested cars20246385

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

Matched on annual mileage as well as age, the Mercedes-Benz Viano index is 88.8, against 95.8 on age alone (2019–2024, n = 5,332).

slope · Mercedes-Benz Viano · Age and mileage adjusted index · 88.8 vs 95.8 · 2019–2024
Age and mileage adjusted index: 95.8 vs 88.8. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Age and mileage adjusted index88.8index95.82019–20245332

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz Viano fuel fails its MOT less?

All Mercedes-Benz Vianos tested were diesel: 35.0% failed first time (2024, n = 4,791).

bar · Mercedes-Benz Viano · Diesel · 35.0 vs other fuels · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Diesel35.0% fail first timeother fuels20244791

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz Viano engine is best?

For its age, the best Mercedes-Benz Viano engine is the petrol over 2.0 litre at index 85.2, and the worst the diesel over 2.0 litre at 101.4, where 100 = the model's own average (2024, n = 5,332).

bar · Mercedes-Benz Viano · Petrol over 2.0 litre (rough estimate: 2,557 tests, 95% interval 80.4–90.1) · 85.2 vs 100 = model average · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Petrol over 2.0 litre (rough estimate: 2,557 tests, 95% interval 80.4–90.1)85.2index vs model norm100 = model average20242557
Diesel over 2.0 litre101.4index vs model norm100 = model average202430010

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (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 Viano fail its MOT most?

Mercedes-Benz Viano fails first-time MOTs most in Hull (HU): 54.9% against 34.3% across Britain for this model, both 2019–2024 (2024, n = 164).

First-time failure rates for the Mercedes-Benz Viano range from 22.0% in the London W (W) postcode area to 50.8% in the Bristol (BS) postcode area, before allowing for age: a wider spread by area than for the typical model.

map · Mercedes-Benz Viano · Hull (HU) (rough estimate: 164 tests, 95% interval 47.2–62.3%) · 54.9 vs 34.8 · 2024
Scotland. N. England. Wales. London. S. West. % failing. 22%. 51%. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Hull (HU) (rough estimate: 164 tests, 95% interval 47.2–62.3%)54.9% fail first time34.82024164
Exeter (EX) (rough estimate: 281 tests, 95% interval 46.1–57.7%)52.0% fail first time34.82024281
Bath (BA) (rough estimate: 231 tests, 95% interval 45.5–58.3%)52.0% fail first time34.82024231
London W (W)22.0% fail first time34.82024501
Enfield (EN) (rough estimate: 218 tests, 95% interval 17.0–28.0%)22.0% fail first time34.82024218
Sutton (SM) (rough estimate: 131 tests, 95% interval 15.9–30.0%)22.1% fail first time34.82024131
Bristol (BS)50.8% fail first time34.82024575
Crewe (CW) (rough estimate: 125 tests, 95% interval 41.0–58.2%)49.6% fail first time34.82024125
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Dorchester (DT) (rough estimate: 133 tests, 95% interval 40.5–57.3%)48.9% fail first time34.82024133
Lincoln (LN) (rough estimate: 107 tests, 95% interval 39.3–58.0%)48.6% fail first time34.82024107
Aberdeen (AB) (rough estimate: 184 tests, 95% interval 41.3–55.6%)48.4% fail first time34.82024184
Taunton (TA) (rough estimate: 186 tests, 95% interval 39.2–53.4%)46.2% fail first time34.82024186
Truro (TR) (rough estimate: 198 tests, 95% interval 38.7–52.4%)45.5% fail first time34.82024198
Plymouth (PL) (rough estimate: 339 tests, 95% interval 38.8–49.3%)44.0% fail first time34.82024339
Swansea (SA) (rough estimate: 258 tests, 95% interval 37.9–49.9%)43.8% fail first time34.82024258
Torquay (TQ) (rough estimate: 110 tests, 95% interval 34.7–53.0%)43.6% fail first time34.82024110
Bromley (BR) (rough estimate: 122 tests, 95% interval 35.0–52.3%)43.4% fail first time34.82024122
Inverness (IV) (rough estimate: 129 tests, 95% interval 35.2–52.0%)43.4% fail first time34.82024129
Stockport (SK) (rough estimate: 319 tests, 95% interval 37.3–48.1%)42.6% fail first time34.82024319
Wigan (WN) (rough estimate: 100 tests, 95% interval 32.8–51.8%)42% fail first time34.82024100
Edinburgh (EH) (rough estimate: 284 tests, 95% interval 36.3–47.7%)41.9% fail first time34.82024284
Brighton (BN) (rough estimate: 495 tests, 95% interval 37.0–45.6%)41.2% fail first time34.82024495
Stoke-on-Trent (ST) (rough estimate: 249 tests, 95% interval 35.0–47.2%)41.0% fail first time34.82024249
Worcester (WR) (rough estimate: 171 tests, 95% interval 33.8–48.4%)40.9% fail first time34.82024171
Ipswich (IP) (rough estimate: 328 tests, 95% interval 35.7–46.2%)40.9% fail first time34.82024328
Norwich (NR) (rough estimate: 287 tests, 95% interval 34.6–45.8%)40.1% fail first time34.82024287
Bournemouth (BH) (rough estimate: 418 tests, 95% interval 35.1–44.5%)39.7% fail first time34.82024418
Leeds (LS) (rough estimate: 242 tests, 95% interval 33.3–45.5%)39.3% fail first time34.82024242
Newcastle (NE) (rough estimate: 283 tests, 95% interval 33.7–45.0%)39.2% fail first time34.82024283
Paisley (PA) (rough estimate: 125 tests, 95% interval 31.1–48.0%)39.2% fail first time34.82024125
Salisbury (SP) (rough estimate: 152 tests, 95% interval 31.4–46.8%)38.8% fail first time34.82024152
Gloucester (GL) (rough estimate: 286 tests, 95% interval 33.3–44.6%)38.8% fail first time34.82024286
Newport (NP) (rough estimate: 147 tests, 95% interval 31.3–46.8%)38.8% fail first time34.82024147
Walsall (WS) (rough estimate: 217 tests, 95% interval 32.0–44.9%)38.3% fail first time34.82024217
Llandudno (LL) (rough estimate: 160 tests, 95% interval 31.0–45.8%)38.1% fail first time34.82024160
York (YO) (rough estimate: 213 tests, 95% interval 31.3–44.2%)37.6% fail first time34.82024213
Southampton (SO) (rough estimate: 424 tests, 95% interval 33.0–42.2%)37.5% fail first time34.82024424
Cambridge (CB) (rough estimate: 207 tests, 95% interval 30.9–44.0%)37.2% fail first time34.82024207
Reading (RG)37.2% fail first time34.82024554
Cardiff (CF)37.1% fail first time34.82024528
Swindon (SN) (rough estimate: 243 tests, 95% interval 31.2–43.3%)37.0% fail first time34.82024243
Warrington (WA) (rough estimate: 246 tests, 95% interval 31.2–43.2%)37.0% fail first time34.82024246
Dudley (DY) (rough estimate: 144 tests, 95% interval 29.4–44.9%)36.8% fail first time34.82024144
Chester (CH) (rough estimate: 212 tests, 95% interval 30.6–43.5%)36.8% fail first time34.82024212
Portsmouth (PO)36.2% fail first time34.82024812
Nottingham (NG) (rough estimate: 412 tests, 95% interval 31.7–40.9%)36.2% fail first time34.82024412
Oxford (OX) (rough estimate: 458 tests, 95% interval 31.6–40.3%)35.8% fail first time34.82024458
Blackpool (FY) (rough estimate: 112 tests, 95% interval 27.4–44.9%)35.7% fail first time34.82024112
Doncaster (DN) (rough estimate: 300 tests, 95% interval 30.5–41.2%)35.7% fail first time34.82024300
Southend-on-Sea (SS) (rough estimate: 250 tests, 95% interval 29.9–41.7%)35.6% fail first time34.82024250
Canterbury (CT) (rough estimate: 245 tests, 95% interval 29.8–41.7%)35.5% fail first time34.82024245
Tonbridge (TN) (rough estimate: 371 tests, 95% interval 30.6–40.3%)35.3% fail first time34.82024371
Guildford (GU)35.2% fail first time34.82024579
Glasgow (G) (rough estimate: 398 tests, 95% interval 30.4–39.7%)34.9% fail first time34.82024398
Preston (PR) (rough estimate: 250 tests, 95% interval 29.2–40.9%)34.8% fail first time34.82024250
Derby (DE) (rough estimate: 360 tests, 95% interval 29.7–39.5%)34.4% fail first time34.82024360
Northampton (NN) (rough estimate: 369 tests, 95% interval 29.8–39.4%)34.4% fail first time34.82024369
Peterborough (PE)34% fail first time34.82024600
Manchester (M) (rough estimate: 498 tests, 95% interval 29.3–37.6%)33.3% fail first time34.82024498
Medway (ME) (rough estimate: 309 tests, 95% interval 28.0–38.4%)33.0% fail first time34.82024309
Luton (LU) (rough estimate: 289 tests, 95% interval 27.7–38.5%)32.9% fail first time34.82024289
Leicester (LE) (rough estimate: 472 tests, 95% interval 28.8–37.2%)32.8% fail first time34.82024472
Bradford (BD) (rough estimate: 184 tests, 95% interval 26.3–39.7%)32.6% fail first time34.82024184
Kingston upon Thames (KT) (rough estimate: 498 tests, 95% interval 28.6–36.8%)32.5% fail first time34.82024498
Chelmsford (CM) (rough estimate: 386 tests, 95% interval 27.9–37.2%)32.4% fail first time34.82024386
Wolverhampton (WV) (rough estimate: 207 tests, 95% interval 26.4–39.0%)32.4% fail first time34.82024207
Sheffield (S) (rough estimate: 489 tests, 95% interval 28.3–36.6%)32.3% fail first time34.82024489
Colchester (CO) (rough estimate: 211 tests, 95% interval 26.3–38.8%)32.2% fail first time34.82024211
London NW (NW)32.2% fail first time34.82024964
Wakefield (WF) (rough estimate: 201 tests, 95% interval 25.3–38.1%)31.3% fail first time34.82024201
Hemel Hempstead (HP) (rough estimate: 438 tests, 95% interval 26.9–35.5%)31.1% fail first time34.82024438
Milton Keynes (MK) (rough estimate: 380 tests, 95% interval 26.6–35.9%)31.1% fail first time34.82024380
Cleveland (TS) (rough estimate: 171 tests, 95% interval 24.5–38.3%)31.0% fail first time34.82024171
Redhill (RH) (rough estimate: 423 tests, 95% interval 26.3–35.0%)30.5% fail first time34.82024423
Watford (WD) (rough estimate: 186 tests, 95% interval 24.0–37.1%)30.1% fail first time34.82024186
Coventry (CV) (rough estimate: 451 tests, 95% interval 25.9–34.3%)29.9% fail first time34.82024451
Stevenage (SG) (rough estimate: 218 tests, 95% interval 24.1–36.2%)29.8% fail first time34.82024218
Motherwell (ML) (rough estimate: 104 tests, 95% interval 21.9–39.2%)29.8% fail first time34.82024104
Dartford (DA) (rough estimate: 246 tests, 95% interval 23.9–35.2%)29.3% fail first time34.82024246
Harrow (HA)29.2% fail first time34.82024845
Romford (RM) (rough estimate: 394 tests, 95% interval 24.4–33.3%)28.7% fail first time34.82024394
London N (N) (rough estimate: 469 tests, 95% interval 24.3–32.4%)28.1% fail first time34.82024469
Slough (SL) (rough estimate: 445 tests, 95% interval 23.3–31.5%)27.2% fail first time34.82024445
Birmingham (B)26.8% fail first time34.820241108
Bolton (BL) (rough estimate: 293 tests, 95% interval 21.9–32.0%)26.6% fail first time34.82024293
Oldham (OL) (rough estimate: 199 tests, 95% interval 20.5–32.6%)26.1% fail first time34.82024199
Ilford (IG) (rough estimate: 236 tests, 95% interval 20.3–31.3%)25.4% fail first time34.82024236
St Albans (AL) (rough estimate: 115 tests, 95% interval 18.2–33.9%)25.2% fail first time34.82024115
Uxbridge (UB)25.1% fail first time34.82024577
Liverpool (L)25.0% fail first time34.82024633
London SW (SW) (rough estimate: 379 tests, 95% interval 20.7–29.4%)24.8% fail first time34.82024379
Blackburn (BB) (rough estimate: 271 tests, 95% interval 20.0–30.2%)24.7% fail first time34.82024271
Twickenham (TW) (rough estimate: 474 tests, 95% interval 21.0–28.8%)24.7% fail first time34.82024474
London SE (SE) (rough estimate: 445 tests, 95% interval 20.7–28.7%)24.5% fail first time34.82024445
London E (E) (rough estimate: 477 tests, 95% interval 19.9–27.5%)23.5% fail first time34.82024477
Croydon (CR) (rough estimate: 400 tests, 95% interval 18.4–26.6%)22.3% fail first time34.82024400

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Does a Mercedes-Benz Viano rust more than average?

Allowing for age, Mercedes-Benz Viano MOTs record corrosion failures at 1.7 times the national rate: 1.27% of tests against 0.77% (2024 + geographic layers, n = 5,196).

Computed, not measured.

slope · Mercedes-Benz Viano · Salt belt susceptibility · 1.7 vs 1 · 2024 + geographic layers
Salt belt susceptibility: 1 vs 1.7. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024 + geographic layers)
MeasureValueUnitCompared withYearsTests
Salt belt susceptibility1.7ratio estimate12024 + geographic layers5196

Source: DVSA MOT bulk data · Window: 2024 + geographic layers · n = 5,332 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Is a Mercedes-Benz Viano ULEZ compliant?

An estimated 5.3% of Mercedes-Benz Vianos 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 Viano · Likely compliant · 5.3 vs baseline · 2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Likely compliant5.3% estimate20245332

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (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 Viano?

Of failed Mercedes-Benz Viano MOTs, 29.1% were retested the same day and a further 65.9% within 10 days; the median failed car passed its retest after 1 day (2019–2024, n = 7,830).

bar · Mercedes-Benz Viano · Same-day retest · 29.1 vs failed initial tests · 2019–2024
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Same-day retest29.1%failed initial tests2019–20247830
Retest within 10 days65.9%failed initial tests2019–20247830
Clean MOT streak30.8%observed chains2019–20245964
Repeat advisory34.3%observed chains2019–20245964
Decreasing odometer3.2% mileage anomalyobserved chains2019–20246266

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (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 Viano?

Mercedes-Benz Vianos aged 5 to 14 doing under 5,000 miles a year failed first time in 22.3% of tests, against 35.2% for those doing 8,000 to 12,000 miles (2019–2024, n = 1,955).

bullet · Mercedes-Benz Viano · Low-use first-time failure · 22.3 vs 35.2 · 2019–2024
Low-use first-time failure: 22.3 vs 35.2. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Low-use first-time failure22.3%35.22019–20241955
Low-use gap-12.9percentage points8–12k miles2019–20241955

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (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 Viano likely to last?

Mercedes-Benz Vianos tend to last: at ten years old the typical one has about 9.1 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 Viano · Age 5 (at least; observed only until age 19) · 18.1 vs baseline · survival forecast
DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (survival forecast)
MeasureValueUnitCompared withYearsTests
Age 5 (at least; observed only until age 19)18.1years forecastsurvival forecast0
Age 8 (at least; observed only until age 19)11.1years forecastsurvival forecast0
Age 10 (at least; observed only until age 19)9.1years forecastsurvival forecast0
Age 12 (at least; observed only until age 19)7.1years forecastsurvival forecast0
Age 15 (at least; observed only until age 19)4.1years forecastsurvival forecast0

Source: DVSA MOT bulk data · Window: survival forecast · n = 5,332 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz Vianos are still on the road?

In 2024, for every 100 Mercedes-Benz Vianos tested at ages 4 to 6, about 57 were tested at age 19 (2024, n = 654).

line · Mercedes-Benz Viano · Age 3 (rough estimate: 55 tests, 95% interval 20.3–44.0%) · 4.8 vs baseline · 2024
Age 3 (rough estim: 4.8. Age 19: 57.4. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 3 (rough estimate: 55 tests, 95% interval 20.3–44.0%)4.8% of age 4–6 baseline202455
Age 421% of age 4–6 baseline2024239
Age 577.1% of age 4–6 baseline2024878
Age 6 (at least as many as at ages 4–6)100% of age 4–6 baseline20241399
Age 7 (at least as many as at ages 4–6)100% of age 4–6 baseline20242070
Age 8 (at least as many as at ages 4–6)100% of age 4–6 baseline20242510
Age 9 (at least as many as at ages 4–6)100% of age 4–6 baseline20242948
Age 10 (at least as many as at ages 4–6)100% of age 4–6 baseline20243227
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 11 (at least as many as at ages 4–6)100% of age 4–6 baseline20242989
Age 12 (at least as many as at ages 4–6)100% of age 4–6 baseline20242830
Age 13 (at least as many as at ages 4–6)100% of age 4–6 baseline20242676
Age 14 (at least as many as at ages 4–6)100% of age 4–6 baseline20242606
Age 15 (at least as many as at ages 4–6)100% of age 4–6 baseline20242482
Age 16 (at least as many as at ages 4–6)100% of age 4–6 baseline20242035
Age 17 (at least as many as at ages 4–6)100% of age 4–6 baseline20241585
Age 1898.8% of age 4–6 baseline20241125
Age 1957.4% of age 4–6 baseline2024654

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

35.7% of Mercedes-Benz Vianos that failed an MOT failed the next one too, against 29.3% after a pass (2019–2024, n = 2,528). The failure most likely to come back is visibility: 39.1% of those fails recurred at the next MOT.

bullet · Mercedes-Benz Viano · Repeat after fail · 35.7 vs 29.3 · 2019–2024
Repeat after fail: 35.7 vs 29.3. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2019–2024)
MeasureValueUnitCompared withYearsTests
Repeat after fail35.7%29.32019–20242528

Source: DVSA MOT bulk data · Window: 2019–2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Which Mercedes-Benz Viano faults come together?

On Mercedes-Benz Vianos, identification of the vehicle and seat belts and supplementary restraint systems failures turn up together 5.7 times as often as chance would predict (2024, n = 29).

Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Identification of the vehicle + Seat belts and supplementary restraint systems (rough estimate: 29 tests, 95% interval 3.8–8.1)5.7liftexpected joint rate202429
Body, chassis, structure + Noise, emissions and leaks (rough estimate: 272 tests, 95% interval 4.7–6.0)5.3liftexpected joint rate2024272
Identification of the vehicle + Noise, emissions and leaks (rough estimate: 25 tests, 95% interval 3.1–7.1)4.8liftexpected joint rate202425
Noise, emissions and leaks + Seat belts and supplementary restraint systems (rough estimate: 185 tests, 95% interval 3.9–5.2)4.5liftexpected joint rate2024185
Body, chassis, structure + Seat belts and supplementary restraint systems (rough estimate: 223 tests, 95% interval 3.9–5.0)4.4liftexpected joint rate2024223
Noise, emissions and leaks + Road Wheels (rough estimate: 22 tests, 95% interval 2.6–6.4)4.2liftexpected joint rate202422
Road Wheels + Seat belts and supplementary restraint systems (rough estimate: 21 tests, 95% interval 2.5–6.2)4.1liftexpected joint rate202421
Body, chassis, structure + Identification of the vehicle (rough estimate: 26 tests, 95% interval 2.6–6.0)4.1liftexpected joint rate202426
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Brakes + Road Wheels (rough estimate: 67 tests, 95% interval 3.1–5.1)4liftexpected joint rate202467
Body, chassis, structure + Brakes3.8liftexpected joint rate2024622
Body, chassis, structure + Suspension (rough estimate: 499 tests, 95% interval 3.3–4.0)3.6liftexpected joint rate2024499
Lamps, reflectors and electrical equipment + Road Wheels (rough estimate: 87 tests, 95% interval 2.8–4.3)3.5liftexpected joint rate202487
Brakes + Noise, emissions and leaks (rough estimate: 463 tests, 95% interval 3.2–3.8)3.5liftexpected joint rate2024463
Brakes + Seat belts and supplementary restraint systems (rough estimate: 456 tests, 95% interval 3.2–3.8)3.5liftexpected joint rate2024456
Seat belts and supplementary restraint systems + Suspension (rough estimate: 378 tests, 95% interval 3.1–3.8)3.4liftexpected joint rate2024378
Brakes + Identification of the vehicle (rough estimate: 57 tests, 95% interval 2.6–4.4)3.4liftexpected joint rate202457
Body, chassis, structure + Road Wheels (rough estimate: 22 tests, 95% interval 2.1–5.2)3.4liftexpected joint rate202422
Body, chassis, structure + Steering (rough estimate: 132 tests, 95% interval 2.8–4.0)3.4liftexpected joint rate2024132
Road Wheels + Tyres (rough estimate: 31 tests, 95% interval 2.3–4.7)3.3liftexpected joint rate202431
Lamps, reflectors and electrical equipment + Seat belts and supplementary restraint systems3.3liftexpected joint rate2024628
Seat belts and supplementary restraint systems + Steering (rough estimate: 102 tests, 95% interval 2.6–4.0)3.3liftexpected joint rate2024102
Body, chassis, structure + Lamps, reflectors and electrical equipment3.2liftexpected joint rate2024766
Steering + Suspension (rough estimate: 269 tests, 95% interval 2.8–3.5)3.1liftexpected joint rate2024269
Noise, emissions and leaks + Tyres (rough estimate: 228 tests, 95% interval 2.7–3.5)3.1liftexpected joint rate2024228
Brakes + Suspension3.0liftexpected joint rate20241084
Identification of the vehicle + Tyres (rough estimate: 28 tests, 95% interval 2.0–4.4)3.0liftexpected joint rate202428
Identification of the vehicle + Suspension (rough estimate: 42 tests, 95% interval 2.2–4.1)3.0liftexpected joint rate202442
Identification of the vehicle + Lamps, reflectors and electrical equipment (rough estimate: 73 tests, 95% interval 2.3–3.8)3.0liftexpected joint rate202473
Noise, emissions and leaks + Steering (rough estimate: 94 tests, 95% interval 2.4–3.6)3.0liftexpected joint rate202494
Lamps, reflectors and electrical equipment + Noise, emissions and leaks3.0liftexpected joint rate2024577
Road Wheels + Suspension (rough estimate: 41 tests, 95% interval 2.1–4.0)2.9liftexpected joint rate202441
Seat belts and supplementary restraint systems + Tyres (rough estimate: 211 tests, 95% interval 2.5–3.3)2.9liftexpected joint rate2024211
Brakes + Tyres2.9liftexpected joint rate2024683
Body, chassis, structure + Tyres (rough estimate: 263 tests, 95% interval 2.5–3.3)2.9liftexpected joint rate2024263
Noise, emissions and leaks + Suspension (rough estimate: 317 tests, 95% interval 2.5–3.2)2.9liftexpected joint rate2024317
Brakes + Steering (rough estimate: 283 tests, 95% interval 2.5–3.1)2.8liftexpected joint rate2024283
Brakes + Lamps, reflectors and electrical equipment2.8liftexpected joint rate20241726
Seat belts and supplementary restraint systems + Visibility (rough estimate: 291 tests, 95% interval 2.4–3.0)2.7liftexpected joint rate2024291
Lamps, reflectors and electrical equipment + Suspension2.6liftexpected joint rate20241363
Lamps, reflectors and electrical equipment + Tyres2.5liftexpected joint rate2024880
Body, chassis, structure + Visibility (rough estimate: 343 tests, 95% interval 2.3–2.8)2.5liftexpected joint rate2024343
Lamps, reflectors and electrical equipment + Steering (rough estimate: 376 tests, 95% interval 2.3–2.8)2.5liftexpected joint rate2024376
Suspension + Tyres (rough estimate: 475 tests, 95% interval 2.2–2.6)2.4liftexpected joint rate2024475
Identification of the vehicle + Visibility (rough estimate: 33 tests, 95% interval 1.6–3.4)2.4liftexpected joint rate202433
Lamps, reflectors and electrical equipment + Visibility2.4liftexpected joint rate20241243
Noise, emissions and leaks + Visibility (rough estimate: 258 tests, 95% interval 2.1–2.6)2.3liftexpected joint rate2024258
Steering + Tyres (rough estimate: 129 tests, 95% interval 1.9–2.7)2.3liftexpected joint rate2024129
Brakes + Visibility2.3liftexpected joint rate2024796
Suspension + Visibility2.1liftexpected joint rate2024624
Tyres + Visibility (rough estimate: 408 tests, 95% interval 1.9–2.3)2.1liftexpected joint rate2024408
Road Wheels + Visibility (rough estimate: 27 tests, 95% interval 1.3–2.8)1.9liftexpected joint rate202427
Steering + Visibility (rough estimate: 156 tests, 95% interval 1.6–2.1)1.8liftexpected joint rate2024156
Road Wheels + Steering (seen together; too few for a multiplier)16tests with both202416
Identification of the vehicle + Steering (seen together; too few for a multiplier)13tests with both202413

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Has the Mercedes-Benz Viano had safety recalls?

DVSA lists 31 safety recall campaigns matched to the Mercedes-Benz Viano; check whether yours has been fixed, using its registration number.

Mercedes-Benz Viano: the numbers behind this answer (DVSA register)
MeasureValueUnitCompared withYearsTests
DVSA recall campaigns matched31campaignsDVSA registerDVSA register5332

Source: DVSA register; recall effect covers 11 of 761 models · Window: DVSA register · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

Of every 100 Mercedes-Benz Vianos tested at age 9, about 26 failed the MOT first time (rough estimate); at age 10, about 28 (rough estimate). These are one-year rates for different cars tested in the same year, not a fleet followed over time (2024).

Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
Age 9 (rough estimate: 137 tests, 95% interval 19.6–34.2%)26.3% fail first time2024137
Age 10 (rough estimate: 650 tests, 95% interval 24.5–31.4%)27.9% fail first time2024650
Age 11 (rough estimate: 643 tests, 95% interval 27.8–35.0%)31.3% fail first time2024643
Age 12 (rough estimate: 569 tests, 95% interval 28.1–35.8%)31.8% fail first time2024569
Age 13 (rough estimate: 485 tests, 95% interval 31.9–40.5%)36.1% fail first time2024485
Age 14 (rough estimate: 423 tests, 95% interval 29.0–38.0%)33.3% fail first time2024423
Age 15 (rough estimate: 429 tests, 95% interval 32.9–42.0%)37.3% fail first time2024429
Age 16 (rough estimate: 477 tests, 95% interval 32.5–41.1%)36.7% fail first time2024477
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
Age 17 (rough estimate: 440 tests, 95% interval 36.0–45.1%)40.5% fail first time2024440
Age 18 (rough estimate: 354 tests, 95% interval 39.5–49.8%)44.6% fail first time2024354
Age 19 (rough estimate: 344 tests, 95% interval 37.9–48.3%)43.0% fail first time2024344

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

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

In the Netherlands, 59.7% of Mercedes-Benz Vianos failed their periodic roadworthiness inspection, against 50.8% for all cars there (2024 by country, n = 1,631 inspections).

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

Inspections abroad disagree: none point the same way as Britain, Norway, Finland and the Netherlands do not. Test rules, climate and how the vehicles are used differ, so both readings are shown.

bullet · Mercedes-Benz Viano · Norway · 49.4 vs 33.7 · 2024 by country
Norway: 49.4 vs 33.7. Finland: 50.6 vs 26.3. Netherlands: 59.7 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 Viano: the numbers behind this answer (2024 by country)
MeasureValueUnitCompared withYearsTests
Norway49.4% failed33.72024 by country628
Finland50.6% failed26.32024 by country595
Netherlands59.7% failed50.82024 by country1631

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 = 5,332 (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 Viano MOT matter?

Mercedes-Benz Vianos fail first time most in November (36.7%, against 30.6% for all cars that month) and least in March (32.9%) (2024, n = 5,332).

line · Mercedes-Benz Viano · January · 35.3 vs 31.1 · 2024
January: 35.3. December: 33.5. DVSA MOT bulk data, 24 Sep 2026.
Mercedes-Benz Viano: the numbers behind this answer (2024)
MeasureValueUnitCompared withYearsTests
January35.3% fail first time31.120243196
February34.0% fail first time30.020242664
March32.9% fail first time28.320243183
April35.0% fail first time29.820242192
May34.1% fail first time28.820242300
June34.1% fail first time28.120242505
July33.8% fail first time29.320242770
August34.6% fail first time29.220242375
Full table
Further values · 2024
MeasureValueUnitCompared withYearsTests
September33.4% fail first time28.220242658
October33.7% fail first time30.320243224
November36.7% fail first time30.620243219
December33.5% fail first time29.320242519

Source: DVSA MOT bulk data · Window: 2024 · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

Not enough tests for… (and why)

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

layer not yet computed for this model (covers 211 of 761 models). 5,332 initial Mercedes-Benz Viano tests are in the published model cohort.

Source: NHTSA, US market; covers 211 of 761 models · Window: NHTSA · n = 5,332 (initial tests) · Method: one initial test per test_id · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

See the Mercedes-Benz CLK, a car of the same inspection class with 5.3× the tests · Check your car by registration

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

layer not yet computed for this model (covers 19 of 761 models). 5,332 initial Mercedes-Benz Viano tests are in the published model cohort.

Source: European Commission OBFCM; covers 19 of 761 models · Window: 2021+ cohorts · n = 5,332 (initial tests) · Method: computed estimate, not measured · Updated: 24 Sep 2026 · Release: dvsa-2024-v2 · CSV

See the Mercedes-Benz CLK, a car of the same inspection class with 5.3× the tests · Check your car by registration

How to cite this page

MOT Risk Index (2026). Mercedes-Benz Viano 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-viano/

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

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Mercedes-Benz Viano MOT: quick answers

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

65.3% of first attempts passed in 2024 (5,332 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 5,332 primary tests: 34.75% failed first time and 71.5% passed when cars fixed at the test centre (PRS) count as passes. The age-adjusted MOT Risk Index 91.4 is shown separately.