MOT failure data · 2025
Mercedes-Benz GLB MOT problems
Across every Mercedes-Benz GLB that failed its 2025 MOT, the defect testers recorded most often was condition has a cut in excess of the requirements deep enough to reach the ply or cords, on 24.06% of failure items. The broadest problem area was tyres at 48.74%. These are recorded defects across the model, not a diagnosis of any one car.
Most common Mercedes-Benz GLB MOT failures
| # | Recorded defect | Area | Share |
|---|---|---|---|
| 1 | Condition has a cut in excess of the requirements deep enough to reach the ply or cords | Tyres | 24.06% |
| 2 | Brake pads less than 1.5 mm thick | Brakes | 10.66% |
| 3 | Tread depth tread depth below requirements of 1.6mm | Tyres | 9.43% |
| 4 | Condition has ply or cords exposed | Tyres | 8.82% |
| 5 | Wipers does not clear the windscreen effectively | Visibility | 5.26% |
| 6 | Brake pads worn down to wear indicator | Brakes | 4.65% |
Shares are of all recorded failure items for this model, so they sum to less than 100% — a single failed test often records several defects, and the long tail below the top 6 is not shown.
What this means if you are buying one
Use it as a viewing checklist. If you are looking at a Mercedes-Benz GLB, these are the areas worth inspecting and worth asking about — and worth reading the car's own MOT history for, since a defect that keeps reappearing as an advisory is a better signal than any model-wide average.
The MOT record also has hard limits: it does not check the engine, clutch or gearbox, and it says nothing about outstanding finance, insurance write-off history, stolen markers or whether the mileage is genuine. Our used Mercedes-Benz GLB buying guide covers what to check beyond the MOT.
Checking a specific Mercedes-Benz GLB?
Enter its registration for finance, write-off, stolen, mileage and keeper history.
Other Mercedes-Benz models
- Mercedes-Benz A-Class MOT problems
- Mercedes-Benz GLA MOT problems
- Mercedes-Benz Vito MOT problems
- Mercedes-Benz GLC MOT problems
- Mercedes-Benz CLA MOT problems
- Mercedes-Benz B-Class MOT problems
Mercedes-Benz GLB MOT FAQs
What does a Mercedes-Benz GLB most commonly fail its MOT on?
The single most recorded defect on Mercedes-Benz GLB cars failing their 2025 MOT was "condition has a cut in excess of the requirements deep enough to reach the ply or cords", appearing on 24.06% of failure items.
Does this mean my Mercedes-Benz GLB will fail?
No. This is what testers recorded across every Mercedes-Benz GLB that failed in 2025. It shows where this model tends to need attention, not the condition of any individual car. The Mercedes-Benz GLB passed 91.61% of its initial tests.
How do I see a specific Mercedes-Benz GLB's MOT history?
Enter its registration on our free MOT history check to see that car's own test results, advisories and recorded mileages.
See also: Mercedes-Benz GLB MOT pass rate · used Mercedes-Benz GLB buying guide · free MOT history check
Defect counts from the DVSA MOT Anonymised test-item data for 2025 (class 4 initial tests, failure items only — advisories and minor defects excluded), licensed under the Open Government Licence v3.0.