2015 Mercedes-Benz Viano: common problems and what to check
What gets flagged at MOT on 2015 Mercedes-Benz Vianos, from 129 tests in 2025, plus known faults and what to look at before you buy one.
Small sample: only 129 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.
What gets flagged at MOT
The share of 2015 Mercedes-Benz Viano MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres28% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Brakes25% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Lights and electrics22% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Suspension19% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
- Exhaust and emissions12% of testsRough price £100–£1,200
At the viewing: Look for black soot in the tailpipe, listen for blowing from the exhaust and check for engine or DPF warning lights.
- Steering7% of testsRough price £100–£450
At the viewing: On a straight road the steering wheel should sit straight. Feel for play or knocking when turning.
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Other years
| Year | MOT tests | Most flagged |
|---|---|---|
| 2014 | 622 | Brakes 31% |
| 2013 | 627 | Brakes 27% |
| 2012 | 553 | Tyres 29% |
| 2011 | 454 | Brakes 33% |
| 2010 | 415 | Lights and electrics 36% |
| 2009 | 422 | Brakes 42% |
| 2008 | 453 | Lights and electrics 35% |
| 2007 | 412 | Brakes 39% |
| 2006 | 351 | Brakes 38% |
| 2005 | 347 | Brakes 46% |
| 2004 | 244 | Lights and electrics 43% |
Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2015 Mercedes-Benz Vianos registered in 2015. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score