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 S MOT reliability
Mercedes-Benz Ss passed their MOT first time 93% of the time across 2,183 tests in 2025.
First-time pass rate
93%
MOTs analysed
2,183
Still licensed (GB)
–
Body type
–
Pass rate by year of first registration
In detail:
First registered
2022
2022 hybrid
395 MOTs
Passed first time 95%. Typical mileage 50,522 (most between 28,213 and 75,518).
2022: 100% → 2023: 96% → 2024: 95% → 2025: 95%
Most common failures
- Condition: has ply or cords exposed (2.0%)
- Condition: has ply or cords damaged (0.8%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (0.5%)
- Condition: has a lump, caused by separation or partial failure of its structure (0.5%)
- Wipers: does not clear the windscreen effectively (0.3%)
2022 diesel
150 MOTs
Passed first time 94%. Typical mileage 28,867 (most between 17,381 and 44,959).
2022: 100% → 2023: 94% → 2024: 83% → 2025: 94%
Most common failures
- Condition: has a bulge, caused by separation or partial failure of its structure (2.7%)
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (2.0%)
- Bumpers: damaged and likely to cause injury when grazed or contacted (0.7%)
- Tread depth below requirements of 1.6mm (0.7%)
- Service brake performance: excessively fluctuating (0.7%)
2022 petrol
4 MOTs
Passed first time 100%. Typical mileage 13,880 (most between 12,508 and 19,363).
Most common failures
Where 2022 Ss fail
Wheels & tyres
4.1%
Visibility & wipers
0.5%
Body, structure & corrosion
0.3%
Lights & electrics
0.3%
Looking at a particular car?
See its own MOT history, mileage and red flags, compared with these figures. Free.