MOT fail rates
Mercedes-Benz Glc MOT fail rate by age
How often the Mercedes-Benz Glc fails its MOT at each age, compared with all cars of the same age, and what it fails on. From 298,696 DVSA MOT tests taken 2022 to 2025.
MOT data updated
At 5 years, the most tested age
67 of 338 model groups with enough tests fail less often at 5 years.
What stands out
- At 3 years the Mercedes-Benz Glc fails 8.5% of MOTs (44,615 tests), 3.5 points below the 12.1% for all cars that age. At 10 years it fails 17.1% (1,320 tests), 13.3 points below the 30.3% average.
- The gap is widest at 10 years: 13.3 points below all cars.
- Its most common structural or mechanical fail item at 5 years: Suspension ball joint worn, at 2.5 per 100 MOTs.
MOT fail rate by age
Solid line: this model. Dashed line: all cars at the same age.
| Age | MOT fail rate | Tests (n) | All cars | Difference | Median mileage |
|---|---|---|---|---|---|
| 3 years | 8.5% | 44,615 | 12.1% | −3.5 pts | 25,018 miles |
| 4 years | 9.6% | 56,436 | 13.4% | −3.8 pts | 32,586 miles |
| 5 years | 11.5% | 61,223 | 15.3% | −3.9 pts | 40,831 miles |
| 6 years | 13.8% | 58,927 | 17.8% | −4.0 pts | 49,506 miles |
| 7 years | 15.4% | 42,547 | 20.6% | −5.3 pts | 58,315 miles |
| 8 years | 16.1% | 23,162 | 23.8% | −7.7 pts | 67,725 miles |
| 9 years | 17.2% | 10,466 | 27.1% | −10.0 pts | 76,076 miles |
| 10 years | 17.1% | 1,320 | 30.3% | −13.3 pts | 81,283 miles |
Most common fail items at 5 years
Split into structural or mechanical items and wear items. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.
Structural and mechanical
| Fail item | Per 100 MOTs |
|---|---|
| Suspension ball joint worn Major | 2.5 |
| Malfunction indicator lamp: inoperative or indicates a malfunction Major | 0.7 |
Out of 61,223 MOTs. A test with two faults counts twice.
Wear and upkeep
| Fail item | Per 100 MOTs |
|---|---|
| Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords Major | 2.2 |
| Tyre tread below 1.6 mm Dangerous | 2.2 |
| Tyre with cords exposed Dangerous | 1.4 |
| Brake pads under 1.5 mm Dangerous | 1 |
| Brake pads: worn down to wear indicator Major | 0.7 |
| Registration plates: does not conform to the specified requirements Major | 0.6 |
| Headlamp aim: too low Major | 0.5 |
| Washers: provides insufficient washer liquid Major | 0.5 |
Out of 61,223 MOTs. A test with two faults counts twice.
Other models at 5 years
| Model | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|
| Mercedes-Benz A-Class | 14.1% | 171,041 | 15.3% |
| Mercedes-Benz C-Class | 13.7% | 105,976 | 15.3% |
| Mercedes-Benz E-Class | 14.0% | 77,953 | 15.3% |
MOT fail rate by first-use year
Each year has its own page: the fail rate for cars first used that year at each MOT from 2022 to 2025 with at least 1,000 tests, the most common faults at that age, and the car tax and ULEZ rules for that year.
First-use year data updated .
| First used | Age at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|---|
| 2015 | 10 years in 2025 | 17.1% | 1,315 | 30.3% |
| 2016 | 9 years in 2025 | 17.1% | 9,123 | 27.1% |
| 2017 | 8 years in 2025 | 15.9% | 12,525 | 23.8% |
| 2018 | 7 years in 2025 | 15.8% | 19,004 | 20.6% |
| 2019 | 6 years in 2025 | 13.3% | 17,327 | 17.8% |
| 2020 | 5 years in 2025 | 10.2% | 11,285 | 15.3% |
| 2021 | 4 years in 2025 | 9.2% | 6,650 | 13.4% |
| 2022 | 3 years in 2025 | 8.8% | 7,258 | 12.1% |
More on the Mercedes-Benz Glc
Looking at one Mercedes-Benz Glc?
These are figures for the model, not for one car. The VetTheCar Buying Report looks at a single car: its MOT tests, defects, advisories and mileage readings.
Source
Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 22 September 2026.
Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources