2014 Mercedes-Benz B-Class · 29,108 MOT tests
2014 Mercedes-Benz B-Class reliability
2014 Mercedes-Benz B-Classs fail 23.2% of first MOT tests, 13% fewer MOT fails than the average car its age and mileage, ranking 7 of 16 B-Class years (29,108 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- 23.2%
- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- fails than cars of the same age and mileage
- 13% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 9
- 62,905
- typical miles at its MOT, aged about 9
- MOT tests, 2022 to 2024
- 29,108
- MOT tests, 2022 to 2024
Year on year
2014 against the years either side
- 2013 cars: 15% fewer MOT fails than the average car its age (the 2014 car does worse)
- 2015 cars: 15% fewer MOT fails than the average car its age (the 2014 car does worse)
- Weak spot: seat belts and airbags, 1.8% of tests fail here (205% above cars of the same age and mileage).
- Strong point: brakes, 42% fewer fails than comparable cars.
- Plates: a 2014 car carries a 63 plate (January–February 2014), or a 14 plate (March–August 2014), or a 64 plate (September–December 2014).
Common problems
What fails on a 2014 Mercedes-Benz B-Class
Fail rate by area
- Lights and electrics8.1%
- Tyres7%
- Suspension6.2%
- Brakes3.2%
- Exhaust, emissions and leaks3%
- Windscreen, wipers and mirrors2.4%
- Seat belts and airbags1.8%
Average for cars of the same age and mileage
Top failures
Coil spring fractured or broken 2.55%
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
Registration plate lamp not working 2.37%
A dark number plate lamp makes the plate hard to read at night, which is illegal and must be fixed.
Tyre cut reaching ply or cords 1.68%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Anti-roll bar linkage dust cover unsealed 1.62%
A damaged dust cover lets dirt into the linkage joint, speeding wear and possibly needing a future repair.
Tyre ply or cords exposed 1.54%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Diesel engine warning light faulty 1.5%
A lit or non-working engine warning light can hide faults, so diagnosis is needed before buying.
Common advisories
Tyre worn close to legal limit (12.42%) · Tyre slightly damaged or cracking (7.76%) · Brake pads wearing thin (7.06%) · Brake disc pitted or scored (5.75%) · Brake discs showing some wear (3.34%) · Child seat limits belt inspection (2.53%)
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 2014 Mercedes-Benz B-Class reliable?
2014 Mercedes-Benz B-Classs fail 23.2% of first MOT tests, 13% fewer MOT fails than the average car its age and mileage, ranking 7 of 16 B-Class years (29,108 DVSA tests, 2022 to 2024).
What fails on a 2014 Mercedes-Benz B-Class MOT?
Most often coil spring fractured or broken (2.55% of tests), registration plate lamp not working (2.37% of tests), tyre cut reaching ply or cords (1.68% of tests).
How many miles should a 2014 Mercedes-Benz B-Class have done?
At its MOT aged about 9, a typical 2014 Mercedes-Benz B-Class shows 62,905 miles. Much higher or lower is worth asking about.
What plate is a 2014 car?
A car first registered in 2014 carries a 63 plate (January–February 2014), or a 14 plate (March–August 2014), or a 64 plate (September–December 2014).
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