Mercedes-Benz 300 common MOT failures and failure rate
What a Mercedes-Benz 300 fails its MOT on most often, from real DVSA test data, and the part that resolves each item.
Based on 979 MOT tests in a recent DVSA sample.
What it fails on, and the fix
About 20.4% of MOT tests recorded on the Mercedes-Benz 300 in this DVSA sample end in a failure. The pattern is consistent: the same handful of items account for most of them.
Its most common failure is lamps & electrical, which makes up 36.5% of the Mercedes-Benz 300's failures, followed by lamps & electrical, suspension, brakes, exhaust & emissions. 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.
Other models
Sources: DVSA MOT History API: MOT test results and defect data ยท DVSA MOT testing data for Great Britain