2018 Mercedes-Benz A-Class · 155,729 MOT tests
2018 Mercedes-Benz A-Class reliability
2018 Mercedes-Benz A-Classs fail 13.8% of first MOT tests, 10% fewer MOT fails than the average car its age and mileage, ranking 8 of 22 A-Class years (155,729 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz A-Classs: 20.6%)
- 13.8%
- first-time fail rate (all Mercedes-Benz A-Classs: 20.6%)
- fails than cars of the same age and mileage
- 10% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 39,005
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 155,729
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 10% fewer MOT fails than the average car its age (the 2018 car does better)
- 2019 cars: 11% fewer MOT fails than the average car its age (the 2018 car does worse)
- Weak spot: seat belts and airbags, 1.5% of tests fail here (364% above cars of the same age and mileage).
- Strong point: lights and electrics, 45% fewer fails than comparable cars.
- Plates: a 2018 car carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
Common problems
What fails on a 2018 Mercedes-Benz A-Class
Fail rate by area
- Tyres6.2%
- Brakes2.4%
- Windscreen, wipers and mirrors2.3%
- Lights and electrics2.1%
- Seat belts and airbags1.5%
- Exhaust, emissions and leaks0.9%
- Suspension0.7%
Average for cars of the same age and mileage
Top failures
Tyre tread below 1.6mm 1.86%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre cut reaching ply or cords 1.29%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Brake pads worn below 1.5mm 1.27%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Airbag warning lamp shows fault 1.24%
A lit airbag warning means the airbag system may not deploy in a crash, so it needs diagnosing and repairing.
Windscreen washer fluid insufficient 0.85%
Washers are not supplying enough liquid, so the windscreen cannot be cleared properly, which is a safety issue.
Tyre ply or cords exposed 0.85%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Common advisories
Tyre worn close to legal limit (12.67%) · Brake pads wearing thin (7.06%) · Tyre slightly damaged or cracking (6.25%) · Brake disc pitted or scored (3.3%) · Brake discs showing some wear (2.55%) · Tyre worn close to legal limit (1.93%)
Other years
Every Mercedes-Benz A-Class year
The full picture: Mercedes-Benz A-Class reliability. Before you pay for any Mercedes-Benz A-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 2018 Mercedes-Benz A-Class reliable?
2018 Mercedes-Benz A-Classs fail 13.8% of first MOT tests, 10% fewer MOT fails than the average car its age and mileage, ranking 8 of 22 A-Class years (155,729 DVSA tests, 2022 to 2024).
What fails on a 2018 Mercedes-Benz A-Class MOT?
Most often tyre tread below 1.6mm (1.86% of tests), tyre cut reaching ply or cords (1.29% of tests), brake pads worn below 1.5mm (1.27% of tests).
How many miles should a 2018 Mercedes-Benz A-Class have done?
At its MOT aged about 5, a typical 2018 Mercedes-Benz A-Class shows 39,005 miles. Much higher or lower is worth asking about.
What plate is a 2018 car?
A car first registered in 2018 carries a 67 plate (January–February 2018), or a 18 plate (March–August 2018), or a 68 plate (September–December 2018).
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