77,379 tests in 2025
Mercedes-Benz Glc reliability and MOT pass rate
88.1% passed first time. The 11.9% fail rate is 10.7 points better than the all-car average, on a median example 7 years old with 52,120 miles.
MOT pass rates / Mercedes-Benz
Pass rate
88.1%
22.6% of all cars failed; 11.9% of these did.
Fixed on the day
1.8%
Passed after a defect was put right during the visit.
Median at test
52,120 mi
7 years old.
Fail rate by age
| Age at test | Tests | Fail rate |
|---|---|---|
| 3-5 years | 22,692 | 8.1% |
| 6-9 years | 53,277 | 13.5% |
| 10-13 years | 1,241 | 15.2% |
| 14+ years | 1 | — |
What the Glc fails on
Share of failed tests with at least one fail item in each DVSA inspection section. A test can fail in several sections at once.
- Tyres3,301 dangerous42.1%
- Suspension29 dangerous31.8%
- Brakes840 dangerous13.6%
- Body, chassis, structure15 dangerous10.3%
- Noise, emissions and leaks9.2%
- Visibility5 dangerous8.1%
- Lamps, reflectors and electrical equipment4 dangerous3.1%
- Identification of the vehicle2.6%
Is the Glc getting worse?
The fail rate rose 3.3 points to 12% from 2022 to 2025, against a rising rate across all cars.
| Year | Tests | Median age | Fail rate | All cars | |
|---|---|---|---|---|---|
| 2022 | 61,654 | — | 8.7% | 22.5% | |
| 2023 | 71,009 | — | 9.9% | 22.8% | |
| 2024 | 64,071 | — | 11.4% | 23.2% | |
| 2025 | 73,727 | — | 12% | 22.6% |
Fail rate is first attempts at class 4 tests. Median age is the age of a typical Glc at its test that year, and it is the number to watch: across the whole fleet each extra year of age adds roughly 1.9 points to the fail rate, so a model whose age and fail rate rise together is simply getting older.
The exact defects that fail it
Every failure item DVSA recorded against a Glc in 2025, counted by how many tests each one appeared on.
- 1Ball joint: ball joint excessively worn2,169 tests
- 2Condition: has a cut in excess of the requirements deep enough to reach the ply or cords1,433 tests
- 3Tread depth: tread depth below requirements of 1.6mm1,217 tests
- 4Condition: has ply or cords exposed895 tests
- 5Malfunction indicator lamp: inoperative or indicates a malfunction825 tests
- 6Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt809 tests
- 7Brake pads: less than 1.5 mm thick623 tests
- 8Coil spring: fractured or broken540 tests
What wears out first
Advisories are the tester flagging wear that is still legal. A typical Glc collects 2.07 of them per test, and these are the ones that come up most. Treat it as the running-repairs list for the next year or two.
- 1Tread depth: tread depth below requirements of 1.6mm12,208 tests
- 2Brake pads: less than 1.5 mm thick6,179 tests
- 3Ball joint: ball joint excessively worn4,902 tests
- 4Brake discs: in such a condition that it is seriously weakened3,759 tests
- 5Condition: has a tear, caused by separation or partial failure of its structure3,508 tests
- 6Brake discs: significantly and obviously worn2,867 tests
- 7Non-component advisories: Child Seat fitted not allowing full inspection of adult belt2,235 tests
- 8Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm1,963 tests
Questions
What is the Mercedes-Benz Glc MOT pass rate?
88.1% of the 77,379 Mercedes-Benz Glc first-attempt MOTs in 2025 passed. The fail rate of 11.9% compares with 22.6% across all cars. A further 1.8% passed after a defect was fixed during the test visit.
What does a Mercedes-Benz Glc usually fail on?
The single most common failure is "Ball joint: ball joint excessively worn", recorded on 2,169 failed tests, followed by "Condition: has a cut in excess of the requirements deep enough to reach the ply or cords" and "Tread depth: tread depth below requirements of 1.6mm". By section, tyres appears in 42.1% of failures, suspension appears in 31.8% of failures, brakes appears in 13.6% of failures.
Does age change the odds?
Sharply. At 3 to 5 years old the fail rate was 8.1%; at 10-13 years it was 15.2%. The median Mercedes-Benz Glc tested in 2025 was 7 years old with 52,120 miles.
Is the Mercedes-Benz Glc getting less reliable?
The fail rate rose 3.3 points to 12% from 2022 to 2025, against a rising rate across all cars.
First-attempt class 4 tests, 2025, from DVSA’s anonymised MOT data (OGL v3, retrieved 2026-09-12). DVSA records newer cars trim by trim; this page adds every Glc trim together. Year-on-year figures come from the same DVSA extracts for 2026 and earlier years. Full method on the pass rates hub.
DVSA has published 69 safety recalls naming the Mercedes-Benz Glc: Mercedes-Benz Glc recalls.
Other Mercedes-Benz models
Checking a particular Glc?
The odds above are the model. The car in front of you has its own record: every test, every advisory, the mileage at each one.
Due a test? Find an approved MOT station near you.