2021 Mercedes-Benz Glb 200 AMG Line Auto MOT pass rate: 91.1% (2,505 tests)
Is the 2021 Glb 200 AMG Line Auto getting worse?
Pass rate of 2021-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2024 | 92.4% +1.7 vs same-age |
|
| 2025 | 90.0% -0.2 vs same-age |
The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.
What fails on a 2021 Glb 200 AMG Line Auto
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 142 | 44.8% |
| 2 | Brakes | 80 | 25.2% |
| 3 | Visibility | 28 | 8.8% |
| 4 | Lamps, reflectors and electrical equipment | 17 | 5.4% |
| 5 | Suspension | 13 | 4.1% |
| 6 | Identification of the vehicle | 12 | 3.8% |
All Glb 200 AMG Line Auto years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2021 (this page) | 2,505 | 91.1% | +0.7 pts | 30,388 |
| 2022 | 1,510 | 92.5% | +1.2 pts | 27,470 |
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FAQs
Is a 2021 Mercedes-Benz Glb 200 AMG Line Auto reliable?
2021-registered examples passed 91.1% of their MOT tests (2,505 tests, 2023–2025), +0.7 points versus all UK cars registered in the same year. At roughly 5 years old with a median 30,388 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2021 Glb 200 AMG Line Auto?
The median tested example shows 30,388 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.
Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.