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

The Mercedes-Benz CLS passed its MOT first time 76% of the time, but from only 59 MOT tests, so treat it as a rough guide. See pass rates by year, common failures and typical mileage.

- First-time MOT pass rate: 76%
- MOT tests analysed: 59 (DVSA anonymised MOT data, 2025)
- Most common failure area: Exhaust, emissions & leaks
- Licensed in Great Britain: 19,273 (2026 Q2)

These figures come from 59 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 |
| --- | --- | --- | --- |
| 2014 | Petrol | 1 (very few mots) | 100% |
| 2010 | Diesel | 6 (very few mots) | 83% |
| 2009 | Diesel | 7 (very few mots) | 71% |
| 2008 | Diesel | 7 (very few mots) | 86% |
| 2008 | Petrol | 5 (very few mots) | 100% |
| 2007 | Diesel | 11 (very few mots) | 64% |
| 2007 | Petrol | 2 (very few mots) | 100% |
| 2006 | Petrol | 8 (very few mots) | 88% |
| 2006 | Diesel | 5 (very few mots) | 40% |
| 2005 | Petrol | 6 (very few mots) | 67% |
| 2005 | Diesel | 1 (very few mots) | 100% |

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