Across the Mercedes-Benz models we hold data for, 428,714 MOT tests give an average first-time pass rate of 83.1%, above the 80.5% national average for cars aged 3 to 8. The strongest single dataset is the 2018 C-Class at 86.5%; the weakest is the 2015 C-Class at 80.3%. Pick a model to see how it holds up as it ages and what examiners flag.
What fails across Mercedes-Benz
The components examiners flag most often on Mercedes-Benzs, averaged across every model and year we hold and weighted by test volume. The Mercedes-Benzs in this data are mostly diesel (64% diesel), which shapes both the emissions failures above and the running costs.
Brakes25.4%
Emissions & leaks2.5%
Lights & electrics1.9%
Body & structure1.2%
Share of tests flagging each component as a fail or advisory, across all Mercedes-Benz models we hold.
C-Class
83.1% avgFirst-time MOT pass rate · DVSA bulk data · 2022-2024 · class 4 cars · updated 2026-07-07