2018 Mercedes-Benz GLC · 73,851 MOT tests
2018 Mercedes-Benz GLC reliability
2018 Mercedes-Benz GLCs fail 11.4% of first MOT tests, 28% fewer MOT fails than the average car its age and mileage, ranking 7 of 7 GLC years (73,851 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz GLCs: 11.3%)
- 11.4%
- first-time fail rate (all Mercedes-Benz GLCs: 11.3%)
- fails than cars of the same age and mileage
- 28% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 5
- 41,554
- typical miles at its MOT, aged about 5
- MOT tests, 2022 to 2024
- 73,851
- MOT tests, 2022 to 2024
Year on year
2018 against the years either side
- 2017 cars: 33% fewer MOT fails than the average car its age (the 2018 car does worse)
- 2019 cars: 33% fewer MOT fails than the average car its age (the 2018 car does worse)
- Weak spot: suspension, 2.5% of tests fail here (22% above cars of the same age and mileage).
- Strong point: lights and electrics, 74% 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 GLC
Fail rate by area
- Tyres4.7%
- Suspension2.5%
- Brakes1.5%
- Windscreen, wipers and mirrors1.1%
- Exhaust, emissions and leaks1.1%
- Lights and electrics1%
- Body, chassis and structure0.6%
Average for cars of the same age and mileage
Top failures
Suspension ball joint excessively worn 1.63%
A worn ball joint can fail and cause loss of steering control, so it must be replaced promptly.
Tyre cut reaching ply or cords 1.32%
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 1.22%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 1.05%
Exposed ply or cords can let the tyre fail suddenly, so the tyre must be replaced before the car is driven.
Diesel engine warning light faulty 0.61%
A lit or non-working engine warning light can hide faults, so diagnosis is needed before buying.
Brake pads worn below 1.5mm 0.61%
Pads worn below 1.5mm lose stopping power and can damage discs, so replacement is needed before the car is driven.
Common advisories
Tyre worn close to legal limit (10.86%) · Brake pads wearing thin (6.11%) · Tyre slightly damaged or cracking (4.09%) · Suspension ball joint slight play (3.95%) · Brake disc pitted or scored (2.6%) · Child seat limits belt inspection (2.5%)
Other years
Every Mercedes-Benz GLC year
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Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2018 Mercedes-Benz GLC reliable?
2018 Mercedes-Benz GLCs fail 11.4% of first MOT tests, 28% fewer MOT fails than the average car its age and mileage, ranking 7 of 7 GLC years (73,851 DVSA tests, 2022 to 2024).
What fails on a 2018 Mercedes-Benz GLC MOT?
Most often suspension ball joint excessively worn (1.63% of tests), tyre cut reaching ply or cords (1.32% of tests), tyre tread below 1.6mm (1.22% of tests).
How many miles should a 2018 Mercedes-Benz GLC have done?
At its MOT aged about 5, a typical 2018 Mercedes-Benz GLC shows 41,554 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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