2020 Mercedes-Benz GLB · 5,104 MOT tests
2020 Mercedes-Benz GLB reliability
2020 Mercedes-Benz GLBs fail 10% of first MOT tests, 23% fewer MOT fails than the average car its age and mileage, ranking 2 of 2 GLB years (5,104 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz GLBs: 9.7%)
- 10%
- first-time fail rate (all Mercedes-Benz GLBs: 9.7%)
- fails than cars of the same age and mileage
- 23% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 31,664
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 5,104
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2021 cars: 26% fewer MOT fails than the average car its age (the 2020 car does worse)
- Strong point: windscreen, wipers and mirrors, 70% 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 GLB
Fail rate by area
- Tyres4.9%
- Lights and electrics1.7%
- Brakes1.1%
- Windscreen, wipers and mirrors1%
- Suspension0.7%
- Seat belts and airbags0.7%
- Number plates and VIN0.4%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.65%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre tread below 1.6mm 1%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 0.82%
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 0.49%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Wiper blade not clearing windscreen 0.37%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Headlamp aim set too high 0.35%
Headlamps aimed too high can dazzle other drivers, and adjusting them is usually a quick job.
Common advisories
Tyre worn close to legal limit (7.74%) · Brake pads wearing thin (4.7%) · Tyre slightly damaged or cracking (3.61%) · Child seat limits belt inspection (2.9%) · Brake discs showing some wear (1.88%) · Brake disc pitted or scored (1.59%)
Other years
Every Mercedes-Benz GLB year
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Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2020 Mercedes-Benz GLB reliable?
2020 Mercedes-Benz GLBs fail 10% of first MOT tests, 23% fewer MOT fails than the average car its age and mileage, ranking 2 of 2 GLB years (5,104 DVSA tests, 2022 to 2024).
What fails on a 2020 Mercedes-Benz GLB MOT?
Most often tyre cut reaching ply or cords (1.65% of tests), tyre tread below 1.6mm (1% of tests), tyre ply or cords exposed (0.82% of tests).
How many miles should a 2020 Mercedes-Benz GLB have done?
At its MOT aged about 3, a typical 2020 Mercedes-Benz GLB shows 31,664 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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