Petrol Mercedes-Benz Gla: MOT pass rate

87.7% of petrol Mercedes-Benz Glas pass the MOT first time, measured across 26,161 DVSA tests on that fuel type alone. Average mileage at test was 41,484.

Petrol against the other Mercedes-Benz Gla versions

Why the fuel type changes the number

Petrol cars avoid the DPF and emissions failures that catch diesels, and usually fail on the same consumables as any other car.

On the Mercedes-Benz Gla specifically, petrol is the strongest at 87.7%, and this petrol version sits 2.1 points above the 85.6% model average.

What it means if you are buying one

The petrol Mercedes-Benz Gla is the stronger side of this model on MOT data. Still judge the individual car, but the fuel type is a mild point in its favour. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.

Mileage is part of the answer

The average petrol Mercedes-Benz Gla had covered 41,484 miles at test, against 62,857 for the diesel. That is below average for a car this age, worth a mileage-consistency check since an unusually low reading is sometimes clocking rather than luck.

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 Gla page separate age from fuel if you want to isolate one.

Most common MOT failures on a petrol Mercedes-Benz Gla

1. Brake lining or pad worn down to wear indicator, 0.5% of tests (2.72x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 3.2% of tests
3. A tyre seriously damaged, 2.9% of tests
4. a brake lining or pad worn below 1.5mm, 1.9% of tests
5. A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, 1.5% of tests
6. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 1.1% of tests
7. Wiper blade missing or obviously not clearing the windscreen, 0.9% of tests
8. A tyre cords visible or damaged, 0.8% of tests
9. Engine MIL illuminated indicating a malfunction, 0.8% of tests
10. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 0.7% of tests

From 26,234 DVSA-tracked petrol Mercedes-Benz Gla tests, 2024, split out from the Mercedes-Benz Gla's other fuel types. DVSA testers marked 7.55% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.

Most common MOT advisories on a petrol Mercedes-Benz Gla

Flagged but doesn't fail the car, a different list from the failures above.

1. Brake fluid significantly below minimum mark, 0.2% of tests (2.35x the national rate for this defect)
2. Brake disc or drum significantly and obviously worn, 5.3% of tests (1.65x the national rate for this defect)
3. A tyre seriously damaged, 22.7% of tests (1.47x the national rate for this defect), also fails
4. a brake lining or pad worn below 1.5mm, 12.6% of tests (1.35x the national rate for this defect), also fails
5. Lamp emitted colour, position or intensity not in accordance with the requirements, 1.7% of tests (1.22x the national rate for this defect)
6. Tyre tread depth not in accordance with the requirements, 23.9% of tests, also fails
7. Brake disc or drum excessively weakened, insecure or fractured, 6.8% of tests
8. A suspension pin, bush or joint excessively worn, 1.1% of tests
9. Number plate inscription missing or illegible, 0.9% of tests
10. A steering ball joint with excessive wear or free play, 0.9% of tests

From 26,234 DVSA-tracked petrol Mercedes-Benz Gla tests, 2024.

Other Mercedes-Benz Gla fuel types

• Diesel Mercedes-Benz Gla - 84.2%

All Mercedes-Benz Gla MOT data · Every model