Diesel Mercedes-Benz Gls: MOT pass rate
88.5% of diesel Mercedes-Benz Gls pass the MOT first time, measured across 1,739 DVSA tests on that fuel type alone. Average mileage at test was 61,809.
Diesel against the other Mercedes-Benz Gls versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 88.5% | 1,739 |
| Petrol | 90.9% | 243 |
| All Mercedes-Benz Gls | 88.8% | 1,983 |
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 Gls specifically, petrol is the strongest at 90.9%, and this diesel version sits 0.3 points below the 88.8% model average.
What it means if you are buying one
There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. 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 Gls had covered 61,809 miles at test, against 52,111 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 Gls page separate age from fuel if you want to isolate one.
Other Mercedes-Benz Gls fuel types
- Petrol Mercedes-Benz Gls - 90.9%