Diesel Mercedes-Benz G-Class: MOT pass rate
83.1% of diesel Mercedes-Benz G-Class pass the MOT first time, measured across 563 DVSA tests on that fuel type alone. Average mileage at test was 61,935.
Diesel against the other Mercedes-Benz G-Class versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 87% | 841 |
| Diesel | 83.1% | 563 |
| All Mercedes-Benz G-Class | 85.4% | 1,407 |
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 G-Class specifically, petrol is the strongest at 87%, and this diesel version sits 2.3 points below the 85.4% model average.
What it means if you are buying one
The diesel Mercedes-Benz G-Class 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 G-Class had covered 61,935 miles at test, against 49,995 for the petrol. That is around average, so condition and service history will tell you more than the odometer does.
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 G-Class page separate age from fuel if you want to isolate one.