Diesel Mercedes-Benz C: MOT pass rate
76.6% of diesel Mercedes-Benz Cs pass the MOT first time, measured across 222,223 DVSA tests on that fuel type alone. Average mileage at test was 95,767.
Diesel against the other Mercedes-Benz C versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 76.6% | 222,223 |
| Petrol | 79.2% | 126,387 |
| Hybrid | 87.6% | 13,864 |
| All Mercedes-Benz C | 78% | 366,065 |
Why the fuel type changes the number
Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.
On the Mercedes-Benz C specifically, hybrid is the strongest at 87.6%, and this diesel version sits 1.4 points below the 78% model average.
What it means if you are buying one
The diesel Mercedes-Benz C fails more often than the model average, so budget for the items that catch this fuel type and treat a fresh MOT as worth paying for. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel Mercedes-Benz C had covered 95,767 miles at test, against 76,080 for the petrol and 66,318 for the hybrid. That is above average and into the range where cambelts and water pumps are due if they have not already been done, so ask for the service history rather than take the mileage on trust.
Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Mercedes-Benz C page separate age from fuel if you want to isolate one.
Other Mercedes-Benz C fuel types
- Petrol Mercedes-Benz C - 79.2%
- Hybrid Mercedes-Benz C - 87.6%