Mercedes-benz C vs Mercedes-benz S600 auto: 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 S600 auto
76%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S600 auto (76%) 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 S600 auto |
|---|---|---|
| MOT pass rate | 78% ✓ | 76% |
| MOT failure rate | 22% ✓ | 24% |
| Faults & advisories per test | 1.7 | 0.8 ✓ |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 112,156 mi | 57,051 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 S600 auto
- Offside Front Headlamp damaged but light output not reduced (1.7.5a)
- Offside Front wheel bearing has slight play (2.5.A.3c)
- rear brake discs pitted
- Nearside Headlamp aim too low (1.8)
- Bonnet retaining device ineffective (8.4.2)
- Centre Rear Statutory seat belt missing (5.1.1)
Reliability FAQ
On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S600 auto (76%) 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 S600 auto 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.