Petrol Mercedes-Benz Slc: MOT pass rate

89.4% of petrol Mercedes-Benz Slcs pass the MOT first time, measured across 5,474 DVSA tests on that fuel type alone. Average mileage at test was 29,852.

Petrol against the other Mercedes-Benz Slc 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 Slc specifically, petrol is the strongest at 89.4%, and this petrol version sits 1.9 points above the 87.5% model average.

What it means if you are buying one

The petrol Mercedes-Benz Slc 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 Slc had covered 29,852 miles at test, against 42,070 for the diesel. That is low mileage, which usually means light urban use. Short journeys are harder on batteries, brakes and exhausts than motorway miles, so do not assume low miles means low wear.

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

Most common MOT failures on a petrol Mercedes-Benz Slc

1. Any fracture or welding defect on a wheel, 0.3% of tests (5.88x the national rate for this defect)
2. A tyre cords visible or damaged, 3.2% of tests (1.9x the national rate for this defect)
3. ESC MIL indicates a system malfunction, 0.3% of tests (1.44x the national rate for this defect)
4. A tyre seriously damaged, 3.7% of tests (1.32x the national rate for this defect)
5. Warning device shows system malfunction, 0.5% of tests (1.23x the national rate for this defect)
6. Tyre tread depth not in accordance with the requirements, 1.3% of tests
7. A spring or spring component fractured or seriously weakened, 1.1% of tests
8. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 0.8% of tests
9. A suspension pin, bush or joint excessively worn, 0.6% of tests
10. Lambda coefficient outside the default limits or the range specified by the manufacturer, 0.4% of tests

From 5,487 DVSA-tracked petrol Mercedes-Benz Slc tests, 2024, split out from the Mercedes-Benz Slc's other fuel types. DVSA testers marked 8.13% 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 Slc

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

1. A wheel bearing with excessive play, 3% of tests (4.58x the national rate for this defect)
2. A wheel badly distorted or wear between wheel and hub at spigot mounting, 1.7% of tests (1.55x the national rate for this defect)
3. A tyre seriously damaged, 22.5% of tests (1.46x the national rate for this defect), also fails
4. Tyre tread depth not in accordance with the requirements, 24.6% of tests, also fails
5. Brake disc or drum excessively weakened, insecure or fractured, 3.1% of tests
6. a brake lining or pad worn below 1.5mm, 3% of tests
7. Brake disc or drum significantly and obviously worn, 1.8% of tests
8. A suspension pin, bush or joint excessively worn, 0.9% of tests, also fails
9. Number plate inscription missing or illegible, 0.6% of tests
10. Excessive fluctuation in brake effort through each wheel revolution., 0.3% of tests

From 5,487 DVSA-tracked petrol Mercedes-Benz Slc tests, 2024.

Other Mercedes-Benz Slc fuel types

• Diesel Mercedes-Benz Slc - 83.8%

All Mercedes-Benz Slc MOT data · Every model