2020 Mercedes-Benz GLS · 1,109 MOT tests
2020 Mercedes-Benz GLS reliability
2020 Mercedes-Benz GLSs fail 10.6% of first MOT tests, 25% fewer MOT fails than the average car its age and mileage, ranking 5 of 5 GLS years (1,109 DVSA tests, 2022 to 2024).
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- first-time fail rate (all Mercedes-Benz GLSs: 11.1%)
- 10.6%
- first-time fail rate (all Mercedes-Benz GLSs: 11.1%)
- fails than cars of the same age and mileage
- 25% fewer
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 3
- 38,079
- typical miles at its MOT, aged about 3
- MOT tests, 2022 to 2024
- 1,109
- MOT tests, 2022 to 2024
Year on year
2020 against the years either side
- 2019 cars: 45% fewer MOT fails than the average car its age (the 2020 car does worse)
- 2021 cars: 65% fewer MOT fails than the average car its age (the 2020 car does worse)
- Weak spot: number plates and vin, 1.2% of tests fail here (389% above cars of the same age and mileage).
- Strong point: lights and electrics, 66% 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 GLS
Fail rate by area
- Tyres7.4%
- Lights and electrics1.2%
- Number plates and VIN1.2%
- Brakes1.1%
- Suspension0.9%
- Seat belts and airbags0.5%
- Windscreen, wipers and mirrors0.5%
Average for cars of the same age and mileage
Top failures
Tyre tread below 1.6mm 1.89%
Tread below 1.6mm is illegal and reduces grip in wet conditions, so the tyre must be replaced.
Tyre ply or cords exposed 1.53%
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 1.17%
A cut reaching the ply or cords weakens the tyre and can cause a burst, so it must be replaced.
Brake pads worn to wear indicator 0.45%
Pads worn to the indicator are at their limit, reducing braking and needing immediate replacement.
Suspension ball joint excessively worn 0.36%
A worn ball joint can fail and cause loss of steering control, so it must be replaced promptly.
Indicator lamp over half not working 0.36%
More than half the indicator lights are out, so signals are hard for other road users to see.
Common advisories
Tyre worn close to legal limit (6.13%) · Brake pads wearing thin (3.25%) · Brake disc pitted or scored (0.99%) · Tyre has a shallow cut (0.99%) · Tyre slightly damaged or cracking (0.9%) · Tyre worn close to legal limit (0.9%)
Other years
Every Mercedes-Benz GLS year
The full picture: Mercedes-Benz GLS reliability. Before you pay for any Mercedes-Benz GLS, 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 GLS reliable?
2020 Mercedes-Benz GLSs fail 10.6% of first MOT tests, 25% fewer MOT fails than the average car its age and mileage, ranking 5 of 5 GLS years (1,109 DVSA tests, 2022 to 2024).
What fails on a 2020 Mercedes-Benz GLS MOT?
Most often tyre tread below 1.6mm (1.89% of tests), tyre ply or cords exposed (1.53% of tests), tyre cut reaching ply or cords (1.17% of tests).
How many miles should a 2020 Mercedes-Benz GLS have done?
At its MOT aged about 3, a typical 2020 Mercedes-Benz GLS shows 38,079 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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