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Mercedes-benz C vs Mercedes-benz Cla 180: 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 Cla 180
83%
MOT pass rate · 43 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz Cla 180 (83%) 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 Cla 180
MOT pass rate 78% 83% ✓
MOT failure rate 22% 17% ✓
Faults & advisories per test 1.7 1.3 ✓
Dangerous-fault share 3% ✓ 7%
Average mileage 112,156 mi 52,629 mi
Sample size (vehicles) 675,043 43

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 Cla 180

  1. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  4. Rear Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  6. Vehicles internal headlight adjuster altered to recheck lights

Reliability FAQ

On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz Cla 180 (83%) 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 Cla 180 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.