2018 Mercedes-Benz X-Class · 5,886 MOT tests
2018 Mercedes-Benz X-Class reliability
2018 Mercedes-Benz X-Classs fail 19.1% of first MOT tests, 3% more MOT fails than the average car its age and mileage, ranking 3 of 3 X-Class years (5,886 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz X-Classs: 17.1%)
- 19.1%
- first-time fail rate (all Mercedes-Benz X-Classs: 17.1%)
- fails than cars of the same age and mileage
- 3% more
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 56,370
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 5,886
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 18% fewer MOT fails than the average car its age (the 2018 car does worse)
- 2019 cars: 3% fewer MOT fails than the average car its age (the 2018 car does worse)
- Weak spot: seat belts and airbags, 3% of tests fail here (613% above cars of the same age and mileage).
- Strong point: tyres, 41% 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 X-Class
Fail rate by area
- Brakes5.6%
- Exhaust, emissions and leaks4.6%
- Lights and electrics4.3%
- Tyres3.5%
- Seat belts and airbags3%
- Windscreen, wipers and mirrors2.9%
- Body, chassis and structure1.3%
Average for cars of the same age and mileage
Top failures
Diesel engine warning light faulty 2.77%
A lit or non-working engine warning light can hide faults, so diagnosis is needed before buying.
Brake pads worn below 1.5mm 2.21%
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 1.68%
A lit airbag warning means the airbag system may not deploy in a crash, so it needs diagnosing and repairing.
Parking brake efficiency below minimum 1.46%
The parking brake holds the car less well than required, so it may roll on a slope and needs repair.
Wiper blade not clearing windscreen 1.41%
Wipers that do not clear the windscreen reduce visibility in rain, which is a safety risk, so replace them.
Tyre tread below 1.6mm 1.31%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Common advisories
Tyre worn close to legal limit (8.38%) · Brake pads wearing thin (6.81%) · Brake disc pitted or scored (3.52%) · Brake discs showing some wear (3.01%) · Engine oil leak, not excessive (2.02%) · Tyre worn close to legal limit (1.33%)
Other years
Every Mercedes-Benz X-Class year
The full picture: Mercedes-Benz X-Class reliability. Before you pay for any Mercedes-Benz X-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 X-Class reliable?
2018 Mercedes-Benz X-Classs fail 19.1% of first MOT tests, 3% more MOT fails than the average car its age and mileage, ranking 3 of 3 X-Class years (5,886 DVSA tests, 2022 to 2024).
What fails on a 2018 Mercedes-Benz X-Class MOT?
Most often diesel engine warning light faulty (2.77% of tests), brake pads worn below 1.5mm (2.21% of tests), airbag warning lamp shows fault (1.68% of tests).
How many miles should a 2018 Mercedes-Benz X-Class have done?
At its MOT aged about 5, a typical 2018 Mercedes-Benz X-Class shows 56,370 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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