MOT performance
Mercedes-Benz GLC petrol: MOT pass rate and common failures
Of 23,308 MOT tests on petrol Mercedes-Benz GLCs in 2023–2024 (on average 4.3 years old at test, median 34,485 miles), 89.4% passed first time, against 87.0% of 117,567 diesel Mercedes-Benz GLC tests. Allowing for age, mileage and fuel, petrol Mercedes-Benz GLCs failed 31% less often than comparable cars — 0.69× against 0.71× for the Mercedes-Benz GLC as a whole.
23,308 MOT tests on 11,741 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 89.4% | ±0.4 pts (95%), n = 23,308 |
| All Mercedes-Benz GLCs | 87.7% | n = 150,770 |
| Failures vs similar cars | 0.69× | same age, mileage and fuel = 1.00; Mercedes-Benz GLC overall 0.71× |
| Tests with a dangerous defect | 4.2% | n = 23,308 |
| Average age at test | 4.3 years | n = 23,308 |
| Registration years covered | 2011–2022 | DVSA first-use date |
Petrol against the other Mercedes-Benz GLC fuels
Official DVSA test results by fuel, with 73 Auto's adjusted ratio (failures against cars of the same age, mileage and fuel).
| Fuel | Tests | Average age | First-time pass | vs similar cars | Dangerous |
|---|---|---|---|---|---|
| Diesel | 117,567 | 4.9 yrs | 87.0% | -29% | 4.3% |
| Petrol | 23,308 | 4.3 yrs | 89.4% | -31% | 4.2% |
| Hybrid | 9,893 | 2.7 yrs | 91.6% | -21% | 3.2% |
Where petrol Mercedes-Benz GLCs differ
- Body, chassis and structure: petrol Mercedes-Benz GLCs failed 58% more often than the Mercedes-Benz GLC overall, relative to comparable cars (0.98× vs 0.62×).
- Suspension: petrol Mercedes-Benz GLCs failed 34% less often than the Mercedes-Benz GLC overall, relative to comparable cars (0.78× vs 1.18×).
| Area | Petrol (vs similar) | All Mercedes-Benz GLCs (vs similar) |
|---|---|---|
| Tyres | 5.4% (+3%) | 5.2% (-8%) |
| Brakes | 1.6% (-46%) | 1.6% (-52%) |
| Suspension | 1.2% (-22%) | 2.9% (+18%) |
| Lights, reflectors and electrical | 1.1% (-69%) | 1.1% (-75%) |
| Driver's view of the road | 1.1% (-69%) | 1.3% (-61%) |
| Body, chassis and structure | 0.5% (-2%) | 0.5% (-38%) |
| Noise, emissions and leaks | 0.5% (-34%) | 1.3% (-10%) |
| Registration plates and VIN | 0.4% (+140%) | 0.4% (+52%) |
Most common petrol Mercedes-Benz GLC failure items
| Item | Area | Share of tests |
|---|---|---|
| Condition: has a cut in excess of the requirements deep enough to reach the ply or cords | Tyres | 1.87% |
| Condition: has ply or cords exposed | Tyres | 1.47% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 1.45% |
| Ball joint: ball joint excessively worn | Suspension | 1.01% |
| Brake pads: less than 1.5 mm thick | Brakes | 0.77% |
Pass rate by age, by fuel
| Age at test (years) | petrol pass rate (tests) | diesel pass rate (tests) |
|---|---|---|
| 3-4 | 90.3% (12,879) | 89.4% (39,493) |
| 5-6 | 88.2% (9,240) | 85.7% (48,287) |
| 7-8 | 86.6% (447) | 83.8% (20,613) |
Mercedes-Benz GLC by registration year
Registration-year pages cover every fuel of that year.
- 2015 Mercedes-Benz GLC · 82.9%
- 2016 Mercedes-Benz GLC · 84.5%
- 2017 Mercedes-Benz GLC · 85.3%
- 2018 Mercedes-Benz GLC · 86.8%
- 2019 Mercedes-Benz GLC · 89.5%
- 2020 Mercedes-Benz GLC · 90.9%
- 2021 Mercedes-Benz GLC · 91.1%
What this does and doesn't tell you
Fuel is DVSA's recorded fuel type; plug-in and self-charging hybrids are grouped as hybrid. A difference between fuels can come from the engines themselves, or from how the cars are used — diesels typically cover more miles, and the adjusted ratio allows for mileage band but not for every difference in use. For one car, its own MOT history is the better guide: see MOT check.
Check a specific petrol Mercedes-Benz GLC
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.