2015 Mercedes-Benz B-Class · 19,696 MOT tests
2015 Mercedes-Benz B-Class reliability
2015 Mercedes-Benz B-Classs fail 19.4% of first MOT tests, 15% fewer MOT fails than the average car its age and mileage, ranking 3 of 16 B-Class years (19,696 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- 19.4%
- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- fails than cars of the same age and mileage
- 15% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 8
- 54,073
- typical miles at its MOT, aged about 8
- MOT tests, 2022 to 2024
- 19,696
- MOT tests, 2022 to 2024
Year on year
2015 against the years either side
- 2014 cars: 13% fewer MOT fails than the average car its age (the 2015 car does better)
- 2016 cars: 13% fewer MOT fails than the average car its age (the 2015 car does better)
- Weak spot: seat belts and airbags, 1% of tests fail here (123% above cars of the same age and mileage).
- Strong point: brakes, 45% fewer fails than comparable cars.
- Plates: a 2015 car carries a 64 plate (January–February 2015), or a 15 plate (March–August 2015), or a 65 plate (September–December 2015).
Common problems
What fails on a 2015 Mercedes-Benz B-Class
Fail rate by area
- Tyres6.9%
- Lights and electrics6.2%
- Suspension4.1%
- Brakes2.5%
- Windscreen, wipers and mirrors2.2%
- Exhaust, emissions and leaks1.6%
- Seat belts and airbags1%
Average for cars of the same age and mileage
Top failures
Registration plate lamp not working 2.73%
A dark number plate lamp makes the plate hard to read at night, which is illegal and must be fixed.
Coil spring fractured or broken 2.22%
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
Tyre cut reaching ply or cords 1.44%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre ply or cords exposed 1.36%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Brake pads worn below 1.5mm 1.34%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Tyre tread below 1.6mm 1.31%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Common advisories
Tyre worn close to legal limit (11.51%) · Tyre slightly damaged or cracking (8.61%) · Brake pads wearing thin (7.79%) · Brake disc pitted or scored (4.94%) · Brake discs showing some wear (3%) · Child seat limits belt inspection (2.38%)
Other years
Every Mercedes-Benz B-Class year
The full picture: Mercedes-Benz B-Class reliability. Before you pay for any Mercedes-Benz B-Class, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2015 Mercedes-Benz B-Class reliable?
2015 Mercedes-Benz B-Classs fail 19.4% of first MOT tests, 15% fewer MOT fails than the average car its age and mileage, ranking 3 of 16 B-Class years (19,696 DVSA tests, 2022 to 2024).
What fails on a 2015 Mercedes-Benz B-Class MOT?
Most often registration plate lamp not working (2.73% of tests), coil spring fractured or broken (2.22% of tests), tyre cut reaching ply or cords (1.44% of tests).
How many miles should a 2015 Mercedes-Benz B-Class have done?
At its MOT aged about 8, a typical 2015 Mercedes-Benz B-Class shows 54,073 miles. Much higher or lower is worth asking about.
What plate is a 2015 car?
A car first registered in 2015 carries a 64 plate (January–February 2015), or a 15 plate (March–August 2015), or a 65 plate (September–December 2015).
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