Mercedes-benz C vs Mercedes-benz E400: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mercedes-benz C
78%
MOT pass rate · 675,043 vehicles
Mercedes-benz E400
81%
MOT pass rate · 9 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz E400 (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Mercedes-benz C | Mercedes-benz E400 |
|---|---|---|
| MOT pass rate | 78% | 81% ✓ |
| MOT failure rate | 22% | 19% ✓ |
| Faults & advisories per test | 1.7 | 0.5 ✓ |
| Dangerous-fault share | 3% ✓ | 18% |
| Average mileage | 112,156 mi | 36,841 mi |
| Sample size (vehicles) | 675,043 | 9 |
Most common faults
Mercedes-benz C
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
Mercedes-benz E400
- Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
- Anti-lock braking system warning lamp indicates an ABS fault (1.6 (b))
- Electronic braking system warning device indicates a fault (1.7 (b))
- Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g))
- Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii))
- Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii))
Reliability FAQ
On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz E400 (81%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Mercedes-benz C report Full Mercedes-benz E400 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.