2020 Mercedes-Benz S-Class · 1,594 MOT tests
2020 Mercedes-Benz S-Class reliability
2020 Mercedes-Benz S-Classs fail 6.4% of first MOT tests, 58% fewer MOT fails than the average car its age and mileage, ranking 4 of 21 S-Class years (1,594 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz S-Classs: 15.8%)
- 6.4%
- first-time fail rate (all Mercedes-Benz S-Classs: 15.8%)
- fails than cars of the same age and mileage
- 58% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 43,907
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 1,594
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2019 cars: 59% fewer MOT fails than the average car its age (the 2020 car does worse)
- 2021 cars: 82% fewer MOT fails than the average car its age (the 2020 car does worse)
- Strong point: brakes, 64% 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 S-Class
Fail rate by area
- Tyres4.4%
- Brakes1%
- Windscreen, wipers and mirrors0.8%
- Suspension0.6%
- Lights and electrics0.5%
- Exhaust, emissions and leaks0.3%
- Wheels0.2%
Average for cars of the same age and mileage
Top failures
Tyre cut reaching ply or cords 1.13%
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 0.63%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 0.5%
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 0.5%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Suspension ball joint excessively worn 0.25%
A worn ball joint can fail and cause loss of steering control, so it must be replaced promptly.
Wiper blade not clearing windscreen 0.19%
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 (6.78%) · Brake pads wearing thin (2.51%) · Brake disc pitted or scored (1.63%) · Tyre has a shallow cut (1.44%) · Tyre worn close to legal limit (1.07%) · Brake discs showing some wear (0.82%)
Other years
Every Mercedes-Benz S-Class year
The full picture: Mercedes-Benz S-Class reliability. Before you pay for any Mercedes-Benz S-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 S-Class reliable?
2020 Mercedes-Benz S-Classs fail 6.4% of first MOT tests, 58% fewer MOT fails than the average car its age and mileage, ranking 4 of 21 S-Class years (1,594 DVSA tests, 2022 to 2024).
What fails on a 2020 Mercedes-Benz S-Class MOT?
Most often tyre cut reaching ply or cords (1.13% of tests), tyre tread below 1.6mm (0.63% of tests), tyre ply or cords exposed (0.5% of tests).
How many miles should a 2020 Mercedes-Benz S-Class have done?
At its MOT aged about 3, a typical 2020 Mercedes-Benz S-Class shows 43,907 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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