Add RegFlags to your home screen
Open RegFlags straight from your home screen when you want to check a car.
On Android, use Install RegFlags when it appears, or pick Install app or Add to Home screen from your browser's menu.
On iPhone or iPad, open this site in Safari, tap Share, then Add to Home Screen. Keep Open as Web App on if it appears, then tap Add.
Mercedes-Benz C MOT reliability
Mercedes-Benz Cs passed their MOT first time 75% of the time across 357,762 tests in 2025. 16 are still licensed in Great Britain.
First-time pass rate
75%
MOTs analysed
357,762
Still licensed (GB)
16
Body type
–
Pass rate by year of first registration
In detail:
First registered
2022
2022 hybrid
2,989 MOTs
Passed first time 89%. Typical mileage 24,162 (most between 16,294 and 35,435).
2023: 100% → 2024: 94% → 2025: 89%
Most common failures
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (3.5%)
- Condition: has ply or cords exposed (2.7%)
- Tread depth below requirements of 1.6mm (1.3%)
- Condition: has a bulge, caused by separation or partial failure of its structure (1.0%)
- Brake pads: less than 1.5 mm thick (0.6%)
2022 ed
1,243 MOTs
Passed first time 89%. Typical mileage 29,845 (most between 21,106 and 40,226).
2022: 100% → 2023: 92% → 2024: 84% → 2025: 89%
Most common failures
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (2.9%)
- Condition: has ply or cords exposed (2.7%)
- Tread depth below requirements of 1.6mm (1.6%)
- Condition: has a bulge, caused by separation or partial failure of its structure (0.6%)
- Brake pads: less than 1.5 mm thick (0.6%)
2022 hybrid electric (clean)
226 MOTs
Passed first time 96%. Typical mileage 19,382 (most between 12,981 and 26,752).
2024: 100% → 2025: 96%
Most common failures
- Wipers: does not clear the windscreen effectively (0.9%)
- Condition: has ply or cords exposed (0.9%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (0.9%)
- Brake pads: less than 1.5 mm thick (0.4%)
- Headlamp aim: too low (0.4%)
2022 diesel
131 MOTs
Passed first time 91%. Typical mileage 25,409 (most between 17,123 and 34,750).
2024: 80% → 2025: 91%
Most common failures
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (3.8%)
- Condition: has a bulge, caused by separation or partial failure of its structure (2.3%)
- Condition: has ply or cords exposed (1.5%)
- Service brake performance: excessively fluctuating (0.8%)
- Bumpers: insecure (0.8%)
2022 petrol
18 MOTs
Passed first time 94%. Typical mileage 20,512 (most between 16,875 and 28,430).
2023: 100% → 2024: 75% → 2025: 94%
Most common failures
- Condition: has ply or cords exposed (5.6%)
- Tread depth below requirements of 1.6mm (5.6%)
Where 2022 Cs fail
Wheels & tyres
8.9%
Visibility & wipers
0.9%
Lights & electrics
0.8%
Brakes
0.7%
Exhaust, emissions & leaks
0.2%
Seat belts & other equipment
0.2%
Body, structure & corrosion
0.1%
Steering
0.1%
Looking at a particular car?
See its own MOT history, mileage and red flags, compared with these figures. Free.