Ford Fiesta vs Mercedes-Benz C-Class: MOT reliability compared
Updated 05 September 2026.
22.4%
Mercedes-Benz C-Class MOT failure rate, 4.7 pts lower than Ford Fiesta
Mercedes-Benz C-Class is the more reliable MOT performer: 22.4% of Mercedes-Benz C-Class MOTs fail versus 27.1% for Ford Fiesta, a 4.7 point gap.
| Metric | Ford Fiesta | Mercedes-Benz C-Class |
|---|---|---|
| MOT failure rate | 27.1% | 22.4% |
| Tests analysed | 34,778,925 | 8,209,994 |
| Most common failure | Suspension (32.3%) | Suspension (36.0%) |
Questions and answers
Which is more reliable, Ford Fiesta or Mercedes-Benz C-Class?
Mercedes-Benz C-Class is the more reliable MOT performer: 22.4% of Mercedes-Benz C-Class MOTs fail versus 27.1% for Ford Fiesta, a 4.7 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 C-Class?
22.4% of Mercedes-Benz C-Class MOT tests result in a failure, from 8,209,994 tests.