2020 Mercedes-Benz B-Class · 5,538 MOT tests
2020 Mercedes-Benz B-Class reliability
2020 Mercedes-Benz B-Classs fail 7.4% of first MOT tests, 34% fewer MOT fails than the average car its age and mileage, ranking 1 of 16 B-Class years (5,538 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- 7.4%
- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- fails than cars of the same age and mileage
- 34% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 22,559
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 5,538
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2019 cars: 18% fewer MOT fails than the average car its age (the 2020 car does better)
- 2021 cars: 55% fewer MOT fails than the average car its age (the 2020 car does worse)
- Strong point: windscreen, wipers and mirrors, 61% fewer fails than comparable cars.
- Plates: a 2020 car carries a 69 plate (January–February 2020), or a 20 plate (March–August 2020), or a 70 plate (September–December 2020).
Common problems
What fails on a 2020 Mercedes-Benz B-Class
Fail rate by area
- Tyres3.8%
- Lights and electrics1.3%
- Windscreen, wipers and mirrors1.2%
- Brakes0.8%
- Seat belts and airbags0.4%
- Suspension0.3%
- Exhaust, emissions and leaks0.3%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.55%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Wiper blade not clearing windscreen 0.65%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Tyre ply or cords exposed 0.58%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Headlamp aim set too low 0.45%
Headlamps aimed too low light the road poorly and reduce the driver's view ahead, especially at night.
Tyre tread below 1.6mm 0.42%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Brake pads worn below 1.5mm 0.38%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Common advisories
Tyre worn close to legal limit (6.27%) · Tyre slightly damaged or cracking (5.54%) · Brake pads wearing thin (2.46%) · Tyre has a shallow cut (1.79%) · Brake discs showing some wear (1.21%) · Nail in tyre, monitor (0.99%)
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 2020 Mercedes-Benz B-Class reliable?
2020 Mercedes-Benz B-Classs fail 7.4% of first MOT tests, 34% fewer MOT fails than the average car its age and mileage, ranking 1 of 16 B-Class years (5,538 DVSA tests, 2022 to 2024).
What fails on a 2020 Mercedes-Benz B-Class MOT?
Most often tyre cut reaching ply or cords (1.55% of tests), wiper blade not clearing windscreen (0.65% of tests), tyre ply or cords exposed (0.58% of tests).
How many miles should a 2020 Mercedes-Benz B-Class have done?
At its MOT aged about 3, a typical 2020 Mercedes-Benz B-Class shows 22,559 miles. Much higher or lower is worth asking about.
What plate is a 2020 car?
A car first registered in 2020 carries a 69 plate (January–February 2020), or a 20 plate (March–August 2020), or a 70 plate (September–December 2020).
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