Mercedes-benz C vs Mercedes-benz S580 l amg lne prem+ exc e 4ma: 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 S580 l amg lne prem+ exc e 4ma
94%
MOT pass rate · 318 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S580 l amg lne prem+ exc e 4ma (94%) 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 S580 l amg lne prem+ exc e 4ma |
|---|---|---|
| MOT pass rate | 78% | 94% ✓ |
| MOT failure rate | 22% | 6% ✓ |
| Faults & advisories per test | 1.7 | 0.2 ✓ |
| Dangerous-fault share | 3% ✓ | 29% |
| Average mileage | 112,156 mi | 23,376 mi |
| Sample size (vehicles) | 675,043 | 318 |
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 S580 l amg lne prem+ exc e 4ma
- Nearside Rear Tyre has ply or cords exposed (5.2.3 (d) (ii))
- Nearside Rear Inner Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Inner Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Rear Inner Tyre worn close to legal limit/worn on edge 285/35R20 (5.2.3 (e))
- Offside Rear Inner Tyre worn close to legal limit/worn on edge 285/35R20 (5.2.3 (e))
- Offside Front Outer Tyre worn close to legal limit/worn on edge edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S580 l amg lne prem+ exc e 4ma (94%) 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 S580 l amg lne prem+ exc e 4ma 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.