2020 Mercedes-Benz C-Class · 21,791 MOT tests
2020 Mercedes-Benz C-Class reliability
2020 Mercedes-Benz C-Classs fail 10.8% of first MOT tests, 19% fewer MOT fails than the average car its age and mileage, ranking 13 of 25 C-Class years (21,791 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz C-Classs: 24%)
- 10.8%
- first-time fail rate (all Mercedes-Benz C-Classs: 24%)
- fails than cars of the same age and mileage
- 19% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 32,017
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 21,791
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2019 cars: 19% fewer MOT fails than the average car its age (the 2020 car does worse)
- 2021 cars: 22% fewer MOT fails than the average car its age (the 2020 car does worse)
- Weak spot: wheels, 1% of tests fail here (446% above cars of the same age and mileage).
- Strong point: windscreen, wipers and mirrors, 62% 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 C-Class
Fail rate by area
- Tyres6.2%
- Lights and electrics1.4%
- Windscreen, wipers and mirrors1.3%
- Brakes1.1%
- Wheels1%
- Suspension0.6%
- Exhaust, emissions and leaks0.4%
Average for cars of the same age and mileage
Top failures
Tyre tread below 1.6mm 1.52%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 1.28%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Tyre cut reaching ply or cords 1.19%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Tyre bulge from structural failure 0.52%
A bulge means the tyre's structure has failed and it could burst suddenly, so it must be replaced at once.
Road wheel fractured or welded defect 0.44%
A fractured wheel can fail suddenly and cause loss of control, so it must be replaced before driving.
Wiper blade not clearing windscreen 0.43%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Common advisories
Tyre worn close to legal limit (9.08%) · Brake pads wearing thin (3.95%) · Tyre slightly damaged or cracking (3.08%) · Tyre worn close to legal limit (1.49%) · Brake disc pitted or scored (1.38%) · Tyre has a shallow cut (1.33%)
Other years
Every Mercedes-Benz C-Class year
The full picture: Mercedes-Benz C-Class reliability. Before you pay for any Mercedes-Benz C-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 C-Class reliable?
2020 Mercedes-Benz C-Classs fail 10.8% of first MOT tests, 19% fewer MOT fails than the average car its age and mileage, ranking 13 of 25 C-Class years (21,791 DVSA tests, 2022 to 2024).
What fails on a 2020 Mercedes-Benz C-Class MOT?
Most often tyre tread below 1.6mm (1.52% of tests), tyre ply or cords exposed (1.28% of tests), tyre cut reaching ply or cords (1.19% of tests).
How many miles should a 2020 Mercedes-Benz C-Class have done?
At its MOT aged about 3, a typical 2020 Mercedes-Benz C-Class shows 32,017 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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