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Mercedes-Benz SLK MOT reliability
Mercedes-Benz SLKs passed their MOT first time 72% of the time across 54,180 tests in 2025.
First-time pass rate
72%
MOTs analysed
54,180
Still licensed (GB)
–
Body type
Roadster
Pass rate by year of first registration
In detail:
First registered
2016
2016 diesel
876 MOTs
Passed first time 80%. Typical mileage 46,204 (most between 32,679 and 59,810).
2018: 89% → 2019: 87% → 2020: 88% → 2021: 87% → 2022: 87% → 2023: 86% → 2024: 80% → 2025: 80%
Most common failures
- Coil spring: fractured or broken (3.9%)
- Condition: has ply or cords exposed (2.7%)
- Malfunction indicator lamp: inoperative or indicates a malfunction (2.3%)
- Tread depth below requirements of 1.6mm (2.2%)
- Ball joint excessively worn (1.8%)
2016 petrol
373 MOTs
Passed first time 89%. Typical mileage 37,249 (most between 26,414 and 53,098).
2018: 83% → 2019: 93% → 2020: 92% → 2021: 91% → 2022: 91% → 2023: 90% → 2024: 87% → 2025: 89%
Most common failures
- Coil spring: fractured or broken (2.1%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (1.3%)
- Tyre pressure monitoring system: malfunctioning or obviously inoperative (0.8%)
- Condition: has a bulge, caused by separation or partial failure of its structure (0.8%)
- Condition: has ply or cords exposed (0.8%)
Where 2016 SLKs fail
Wheels & tyres
8.8%
Suspension & axles
8.0%
Lights & electrics
2.7%
Exhaust, emissions & leaks
2.4%
Brakes
2.3%
Visibility & wipers
1.0%
Seat belts & other equipment
0.2%
Body, structure & corrosion
0.1%
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