Ford Fiesta vs Mercedes-Benz E-Class: MOT reliability compared
Updated 05 September 2026.
20.5%
Mercedes-Benz E-Class MOT failure rate, 6.6 pts lower than Ford Fiesta
Mercedes-Benz E-Class is the more reliable MOT performer: 20.5% of Mercedes-Benz E-Class MOTs fail versus 27.1% for Ford Fiesta, a 6.6 point gap.
| Metric | Ford Fiesta | Mercedes-Benz E-Class |
|---|---|---|
| MOT failure rate | 27.1% | 20.5% |
| Tests analysed | 34,778,925 | 4,812,594 |
| Most common failure | Suspension (32.3%) | Tyres (31.0%) |
Questions and answers
Which is more reliable, Ford Fiesta or Mercedes-Benz E-Class?
Mercedes-Benz E-Class is the more reliable MOT performer: 20.5% of Mercedes-Benz E-Class MOTs fail versus 27.1% for Ford Fiesta, a 6.6 point gap.
What is the MOT failure rate of the Ford Fiesta?
27.1% of Ford Fiesta MOT tests result in a failure, from 34,778,925 tests.
What is the MOT failure rate of the Mercedes-Benz E-Class?
20.5% of Mercedes-Benz E-Class MOT tests result in a failure, from 4,812,594 tests.