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Mercedes-benz C vs Mercedes-benz S55 l amg 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 S55 l amg auto
86%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S55 l amg auto (86%) 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 S55 l amg auto
MOT pass rate 78% 86% ✓
MOT failure rate 22% 14% ✓
Faults & advisories per test 1.7 ✓ 2.0
Dangerous-fault share 3% 0% ✓
Average mileage 112,156 mi 105,980 mi
Sample size (vehicles) 675,043 1

Most common faults

Mercedes-benz C

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Under-trays fitted obscuring some underside components
  6. Nearside Front Tyre worn close to the legal limit (4.1.E.1)

Mercedes-benz S55 l amg auto

  1. Oil leak
  2. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Front Lower Suspension arm has slight play in a ball joint (2.4.G.2)
  4. Offside Front Shock absorber has a light misting of oil (2.7.3)
  5. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Tyre worn close to the legal limit (4.1.E.1)

Reliability FAQ

On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz S55 l amg auto (86%) 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 S55 l amg 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.