Mercedes-benz C vs Mercedes-benz G400: 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 G400
75%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz G400 (75%) 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 G400 |
|---|---|---|
| MOT pass rate | 78% ✓ | 75% |
| MOT failure rate | 22% ✓ | 25% |
| Faults & advisories per test | 1.7 ✓ | 3.5 |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 112,156 mi | 137,039 mi |
| Sample size (vehicles) | 675,043 | 1 |
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 G400
- Nearside Front Direction indicator slightly discoloured (4.4.3 (a))
- Offside Front Direction indicator slightly discoloured (4.4.3 (a))
- Nearside Front Steering linkage ball joint ball joint dust cover missing (2.1.3 (g) (ii))
- Nearside Front Steering linkage ball joint ball joint dust cover missing rear arm (2.1.3 (g) (ii))
- Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))
- Nearside Windscreen wiper does not clear the windscreen effectively (3.4 (b) (ii))
Reliability FAQ
On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz G400 (75%) 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 G400 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.