Does the Mercedes-Benz Viano fail the MOT on noise, emissions and leaks more than it should?
The Mercedes-Benz Viano records 3.97 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 5.00 expected for a car of the same age mix: less than expected for its class and age (−1.03, 95% interval −1.27 to −0.79). It ranks 442 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 Viano by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Mercedes-Benz Viano is “Engine MIL illuminated indicating a malfunction”, recorded 517 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 517 | 1.58 |
| Smoke opacity levels exceed the manufacturer's specified limit | 305 | 0.93 |
| Emissions test unable to be completed | 146 | 0.45 |
| Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users | 96 | 0.29 |
| An induction or exhaust leak that could affect emissions levels | 52 | 0.16 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 32,805 (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 Viano gets a noise, emissions and leaks advisory, how often does it fail next time?
6.1% of Mercedes-Benz Viano MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12.1 months and 7,238 miles later (1,937 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 1,937 (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 Viano 2004 · Mercedes-Benz Viano 2005 · Mercedes-Benz Viano 2006 · Mercedes-Benz Viano 2007 · Mercedes-Benz Viano 2008 · Mercedes-Benz Viano 2009 · Mercedes-Benz Viano 2010 · Mercedes-Benz Viano 2011 · Mercedes-Benz Viano 2012 · Mercedes-Benz Viano 2013 · Mercedes-Benz Viano 2014 · Mercedes-Benz Viano 2015 · Mercedes-Benz Viano in Norway · Mercedes-Benz Viano in Finland · Mercedes-Benz Viano in the Netherlands · Mercedes-Benz Viano by postcode area · Mercedes-Benz Viano body, chassis and structure failures · Mercedes-Benz Viano brakes failures · Mercedes-Benz Viano vehicle identification failures · Mercedes-Benz Viano lamps, reflectors and electrics failures · Mercedes-Benz Viano road wheels failures · Mercedes-Benz Viano seat belts and airbags failures · Mercedes-Benz Viano steering failures · Mercedes-Benz Viano suspension failures · Mercedes-Benz Viano tyres failures · Mercedes-Benz Viano visibility failures