Petrol Mercedes-Benz Viano: MOT pass rate
75% of petrol Mercedes-Benz Vianos pass the MOT first time, measured across 535 DVSA tests on that fuel type alone. Average mileage at test was 81,176.
Petrol against the other Mercedes-Benz Viano versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 70.9% | 4,855 |
| Petrol | 75% | 535 |
| All Mercedes-Benz Viano | 71.3% | 5,395 |
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 Viano specifically, petrol is the strongest at 75%, and this petrol version sits 3.7 points above the 71.3% model average.
What it means if you are buying one
The petrol Mercedes-Benz Viano 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 Viano had covered 81,176 miles at test, against 156,497 for the diesel. That is above average, the point where suspension bushes, drop links and exhaust corrosion start showing up as advisories before they become failures.
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 Viano page separate age from fuel if you want to isolate one.
Most common MOT failures on a petrol Mercedes-Benz Viano
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction, 3.2% of tests (7.61x the national rate for this defect)
- The aim of a headlamp is not within limits laid down in the requirements, 6.1% of tests (2.61x the national rate for this defect)
- A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 3.7% of tests (2.02x the national rate for this defect)
- Wiper blade missing or obviously not clearing the windscreen, 3% of tests (1.56x the national rate for this defect)
- A tyre seriously damaged, 3.2% of tests
- A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 2.6% of tests (3.98x the national rate for this defect)
- Brake pipe damaged or excessively corroded, 2.6% of tests (2.43x the national rate for this defect)
- A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 2.6% of tests (1.17x the national rate for this defect)
- Engine MIL illuminated indicating a malfunction, 2.6% of tests (2.04x the national rate for this defect)
- Lamp emitted colour, position or intensity not in accordance with the requirements, 2.2% of tests (3.75x the national rate for this defect)
From 538 DVSA-tracked petrol Mercedes-Benz Viano tests, 2024, split out from the Mercedes-Benz Viano's other fuel types. DVSA testers marked 2.55% 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 Viano
Flagged but doesn't fail the car, a different list from the failures above.
- A flexible brake hose excessively damaged, deteriorated, chafed, twisted or stretched, 14.7% of tests (26.2x the national rate for this defect)
- Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 6.9% of tests (6.21x the national rate for this defect)
- Lamp emitted colour, position or intensity not in accordance with the requirements, 6.3% of tests (4.61x the national rate for this defect), also fails
- Brake pipe damaged or excessively corroded, 11% of tests (1.77x the national rate for this defect), also fails
- Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 9.5% of tests (1.7x the national rate for this defect)
- Tyre tread depth not in accordance with the requirements, 26.2% of tests
- Brake disc or drum excessively weakened, insecure or fractured, 13.6% of tests
- A suspension pin, bush or joint excessively worn, 12.5% of tests
- A tyre seriously damaged, 12.3% of tests, also fails
- a brake lining or pad worn below 1.5mm, 3.7% of tests
From 538 DVSA-tracked petrol Mercedes-Benz Viano tests, 2024.
Other Mercedes-Benz Viano fuel types
- Diesel Mercedes-Benz Viano - 70.9%