Mercedes-Benz Gls-Class MOT pass rate and common failures
In 2025, 86.6% of Mercedes-Benz Gls-Class MOT tests were a first-time pass, across 2,726 tests in Great Britain. For all cars it was 71.5%.
Compared with cars of the same age
Older cars fail more often, so a model that’s mostly a few years old will look better than one that’s mostly 12. These figures compare like with like.
At 3–5 years
85.7%
All cars: 86.1% (0.4 points worse). 1,021 tests.
At 6–10 years
87.2%
All cars: 76.1% (11.1 points better). 1,704 tests.
At 11 years and over
–
Too few tests at this age to say.
Pass rate by age
Figures by age, with typical mileage
| Age (years) | Tests | First-time pass | All cars | Typical mileage |
|---|---|---|---|---|
| 3 | 273 | 87.5% | 87.8% | 33,750 miles |
| 4 | 359 | 85.2% | 86.4% | 46,250 miles |
| 5 | 389 | 84.8% | 84.5% | 51,250 miles |
| 6 | 488 | 85.7% | 81.9% | 56,250 miles |
| 7 | 547 | 88.1% | 79.3% | 66,250 miles |
| 8 | 522 | 89.7% | 76.3% | 73,750 miles |
| 9 | 147 | 79.6% | 73.1% | 81,250 miles |
Typical mileage is the median reading at the test, to the nearest 2,500 miles.
What fails most often
The share of Mercedes-Benz Gls-Class MOT tests that failed on at least one item in each area, against all cars. A test can fail on several areas at once.
| Area | Gls-Class | All cars |
|---|---|---|
| Tyres | 11.7% | 8.4% |
| Brakes | 2.2% | 10.2% |
| Lamps, reflectors and electrical equipment | 1.9% | 16.6% |
| Body, chassis, structure | 1.3% | 4.2% |
| Identification of the vehicle | 1.1% | 0.4% |
| Noise, emissions and leaks | 0.9% | 4.0% |
| Suspension | 0.9% | 13.7% |
| Visibility | 0.7% | 5.2% |
Most common reasons for failing
- Tread depth below requirements of 1.6mm failed 3.9% of tests
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords failed 3.0% of tests
- Condition: has ply or cords exposed failed 2.9% of tests
- Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt failed 1.0% of tests
- Registration plates: does not conform to the specified requirements failed 0.9% of tests · what this means
- Malfunction indicator lamp: inoperative or indicates a malfunction failed 0.9% of tests · what this means
- Brake pads: less than 1.5 mm thick failed 0.8% of tests · what this means
- Condition: has a bulge, caused by separation or partial failure of its structure failed 0.7% of tests
- Brake pads: worn down to wear indicator failed 0.6% of tests · what this means
- Headlamp aim: too high failed 0.5% of tests · what this means
Checking a particular Gls-Class?
See its own MOT history, mileage record and advisories in plain English. Free, no sign-up.
About these figures
- They cover every Gls-Class version DVSA records under this name (engines, trims and generations together), on its first MOT test of each visit. A “pass with rectification” (fixed within an hour) counts as a fail, as in DVSA’s own statistics.
- Cars under three years old are left out, because the few tested that young are mostly taxis.
- Fuel mix of the cars tested: diesel 90.6%, petrol 8.6%, hybrid electric (clean) 0.8%.
- A pass rate describes the model, not any one car. How a car has been looked after matters more.
Download these figures (CSV) · Other Mercedes-Benz models · All makes
Source: DVSA anonymised MOT test data for 2025. Contains public sector information licensed under the Open Government Licence v3.0. Our own analysis; not produced or endorsed by DVSA.