Does the Mercedes-Benz CLK fail the MOT on noise, emissions and leaks more than it should?
The Mercedes-Benz CLK records 6.19 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 8.91 expected for a car of the same age mix: less than expected for its class and age (−2.72, 95% interval −2.86 to −2.58). It ranks 589 of 678 models on noise, emissions and leaks (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on noise, emissions and leaks · check a Mercedes-Benz CLK by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Mercedes-Benz CLK is “Engine MIL illuminated indicating a malfunction”, recorded 3,861 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 3,861 | 2.20 |
| Emissions levels exceed default limits | 1,710 | 0.98 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 1,578 | 0.90 |
| Emissions levels exceed the manufacturer's specified limits | 925 | 0.53 |
| Smoke opacity levels exceed the manufacturer's specified limit | 902 | 0.51 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 175,310 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a Mercedes-Benz CLK gets a noise, emissions and leaks advisory, how often does it fail next time?
6.5% of Mercedes-Benz CLK MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12 months and 3,384 miles later (9,321 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 9,321 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
Mercedes-Benz CLK 1998 · Mercedes-Benz CLK 1999 · Mercedes-Benz CLK 2000 · Mercedes-Benz CLK 2001 · Mercedes-Benz CLK 2002 · Mercedes-Benz CLK 2003 · Mercedes-Benz CLK 2004 · Mercedes-Benz CLK 2005 · Mercedes-Benz CLK 2006 · Mercedes-Benz CLK 2007 · Mercedes-Benz CLK 2008 · Mercedes-Benz CLK 2009 · Mercedes-Benz CLK 2010 · Mercedes-Benz CLK in Norway · Mercedes-Benz CLK in Finland · Mercedes-Benz CLK in the Netherlands · Mercedes-Benz CLK by postcode area · Mercedes-Benz CLK body, chassis and structure failures · Mercedes-Benz CLK brakes failures · Mercedes-Benz CLK vehicle identification failures · Mercedes-Benz CLK lamps, reflectors and electrics failures · Mercedes-Benz CLK road wheels failures · Mercedes-Benz CLK seat belts and airbags failures · Mercedes-Benz CLK steering failures · Mercedes-Benz CLK suspension failures · Mercedes-Benz CLK tyres failures · Mercedes-Benz CLK visibility failures