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Mercedes-Benz SLC MOT reliability
Mercedes-Benz SLCs passed their MOT first time 85% of the time across 8,967 tests in 2025.
Photo: Jakub "Flyz1" Maciejewski · CC BY-SA 4.0 · Wikimedia Commons
First-time pass rate
85%
MOTs analysed
8,967
Still licensed (GB)
–
Body type
Roadster
Pass rate by year of first registration
In detail:
First registered
2018
2018 petrol
1,322 MOTs
Passed first time 90%. Typical mileage 28,916 (most between 19,231 and 40,249).
2019: 100% → 2020: 93% → 2021: 92% → 2022: 91% → 2023: 90% → 2024: 89% → 2025: 90%
Most common failures
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (1.7%)
- Condition: has ply or cords exposed (1.5%)
- Malfunction indicator lamp: inoperative or indicates a malfunction (0.6%)
- Tread depth below requirements of 1.6mm (0.6%)
- Coil spring: fractured or broken (0.5%)
2018 diesel
172 MOTs
Passed first time 81%. Typical mileage 36,372 (most between 26,261 and 49,024).
2020: 80% → 2021: 87% → 2022: 87% → 2023: 88% → 2024: 81% → 2025: 81%
Most common failures
- Condition: has ply or cords exposed (3.5%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (2.3%)
- Tread depth below requirements of 1.6mm (1.7%)
- Ball joint excessively worn (1.7%)
- Condition: fractured (1.7%)
Where 2018 SLCs fail
Wheels & tyres
5.5%
Suspension & axles
1.6%
Lights & electrics
1.5%
Brakes
1.1%
Exhaust, emissions & leaks
0.9%
Visibility & wipers
0.4%
Seat belts & other equipment
0.2%
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