# Mercedes-Benz S350 MOT reliability: pass rate and common failures | RegFlags

The Mercedes-Benz S350 passed its MOT first time 93% of the time, but from only 55 MOT tests, so treat it as a rough guide. See pass rates by year, common failures and typical mileage.

- First-time MOT pass rate: 93%
- MOT tests analysed: 55 (DVSA anonymised MOT data, 2025)
- Most common failure area: Exhaust, emissions & leaks

These figures come from 55 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

## By year of first use and fuel

| Year | Fuel | MOT tests | First-time pass rate |
| --- | --- | --- | --- |
| 2025 | ED | 11 (very few mots) | 100% |
| 2024 | ED | 18 (very few mots) | 89% |
| 2023 | ED | 2 (very few mots) | 100% |
| 2019 | Diesel | 2 (very few mots) | 100% |
| 2018 | Diesel | 2 (very few mots) | 100% |
| 2017 | Diesel | 2 (very few mots) | 100% |
| 2016 | Diesel | 2 (very few mots) | 100% |
| 2014 | Diesel | 2 (very few mots) | 100% |
| 2012 | Diesel | 4 (very few mots) | 100% |
| 2011 | Diesel | 4 (very few mots) | 50% |
| 2010 | Diesel | 3 (very few mots) | 100% |
| 2010 | Petrol | 1 (very few mots) | 100% |
| 2007 | Petrol | 1 (very few mots) | 100% |
| 2004 | Petrol | 1 (very few mots) | 100% |

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