Mercedes C180 common MOT failures and failure rate
What a Mercedes C180 fails its MOT on, from real DVSA test data, and the part that resolves each item.
Based on 4,309 MOT tests in DVSA data.
About 24.3% of MOT tests recorded on the Mercedes C180 in DVSA data end in a failure. The same handful of items account for most of them.
Its most common failure is exhaust & emissions, which makes up 0.1% of the Mercedes C180's failures, followed by exhaust & emissions, lamps & electrical. Each item below links to the part that resolves it. Confirm the exact fitment against your registration or VIN before buying, and have safety-critical work done by a competent mechanic.
What it fails on, and why
Exhaust failures cover leaks, insecure mountings and emissions over the limit. A blowing exhaust, a failed lambda reading or a diesel that smokes beyond the limit will fail.
Lighting is the single most common MOT failure and the cheapest to put right. A blown headlight, brake-light or number-plate bulb, a cracked lens, or a headlamp beam that points too high or low will all fail. Most are a two-minute bulb swap.
The parts that fix each
If your car has just failed, you have 10 working days to fix the items and get a free partial retest. These are the usual parts; confirm the exact fitment against your registration or VIN before buying.
Other models
Sources: DVSA MOT History API: MOT test results and defect data ยท DVSA MOT testing data for Great Britain