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Mercedes-Benz Ml MOT reliability
Mercedes-Benz Mls passed their MOT first time 72% of the time across 28,625 tests in 2025.
First-time pass rate
72%
MOTs analysed
28,625
Still licensed (GB)
–
Body type
–
Pass rate by year of first registration
In detail:
First registered
2014
2014 diesel
3,635 MOTs
Passed first time 80%. Typical mileage 93,488 (most between 74,701 and 113,038).
2017: 89% → 2018: 87% → 2019: 86% → 2020: 86% → 2021: 84% → 2022: 82% → 2023: 82% → 2024: 79% → 2025: 80%
Most common failures
- Coil spring: fractured or broken (4.9%)
- Malfunction indicator lamp: inoperative or indicates a malfunction (3.1%)
- Tread depth below requirements of 1.6mm (2.3%)
- Condition: has ply or cords exposed (1.8%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (1.5%)
2014 petrol
148 MOTs
Passed first time 87%. Typical mileage 74,988 (most between 60,124 and 91,144).
2017: 93% → 2018: 89% → 2019: 91% → 2020: 84% → 2021: 83% → 2022: 87% → 2023: 83% → 2024: 88% → 2025: 87%
Most common failures
- Condition: has ply or cords exposed (4.1%)
- Tread depth below requirements of 1.6mm (2.0%)
- Shock absorbers: has a serious fluid leak (1.4%)
- Condition: has a bulge, caused by separation or partial failure of its structure (1.4%)
- Brake pads: less than 1.5 mm thick (1.4%)
Where 2014 Mls fail
Wheels & tyres
6.5%
Suspension & axles
5.5%
Lights & electrics
4.8%
Exhaust, emissions & leaks
3.3%
Brakes
2.8%
Visibility & wipers
2.4%
Body, structure & corrosion
2.0%
Seat belts & other equipment
0.4%
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