Petrol Mercedes-Benz A-Class: MOT pass rate

79.5% of petrol Mercedes-Benz A-Class pass the MOT first time, measured across 94,824 DVSA tests on that fuel type alone. Average mileage at test was 62,315.

Petrol against the other Mercedes-Benz A-Class 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 A-Class specifically, petrol is the strongest at 79.5%, and this petrol version sits 0.4 points above the 79.1% 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. 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 A-Class had covered 62,315 miles at test, against 75,008 for the diesel. 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 A-Class page separate age from fuel if you want to isolate one.

Most common MOT failures on a petrol Mercedes-Benz A-Class

1. A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.3% of tests (2.06x the national rate for this defect)
2. Brake pipe damaged or excessively corroded, 1.8% of tests (1.67x the national rate for this defect)
3. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 2.8% of tests (1.63x the national rate for this defect)
4. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 1.2% of tests (1.25x the national rate for this defect)
5. A tyre seriously damaged, 3.3% of tests (1.19x the national rate for this defect)
6. A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, 1.8% of tests (1.18x the national rate for this defect)
7. A spring or spring component fractured or seriously weakened, 2.7% of tests (1.17x the national rate for this defect)
8. Engine MIL illuminated indicating a malfunction, 1.5% of tests (1.17x the national rate for this defect)
9. Tyre tread depth not in accordance with the requirements, 2.8% of tests
10. The aim of a headlamp is not within limits laid down in the requirements, 2.4% of tests

From 95,177 DVSA-tracked petrol Mercedes-Benz A-Class tests, 2024, split out from the Mercedes-Benz A-Class's other fuel types. DVSA testers marked 5.54% 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 A-Class

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

1. A flexible brake hose excessively damaged, deteriorated, chafed, twisted or stretched, 3.5% of tests (6.21x the national rate for this defect)
2. Brake pipe damaged or excessively corroded, 12.6% of tests (2.03x the national rate for this defect), also fails
3. Brake disc or drum significantly and obviously worn, 4.5% of tests (1.42x the national rate for this defect)
4. A tyre seriously damaged, 20% of tests (1.29x the national rate for this defect), also fails
5. A wheel badly distorted or wear between wheel and hub at spigot mounting, 1.3% of tests (1.26x the national rate for this defect)
6. Tyre tread depth not in accordance with the requirements, 25% of tests, also fails
7. Brake disc or drum excessively weakened, insecure or fractured, 10.4% of tests
8. a brake lining or pad worn below 1.5mm, 10% of tests
9. A suspension pin, bush or joint excessively worn, 3.5% of tests
10. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 3.4% of tests, also fails

From 95,177 DVSA-tracked petrol Mercedes-Benz A-Class tests, 2024.

Other Mercedes-Benz A-Class fuel types

• Diesel Mercedes-Benz A-Class - 78.8%

All Mercedes-Benz A-Class MOT data · Every model