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Mercedes-benz C vs Mercedes-benz Cls320: 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 Cls320
73%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz Cls320 (73%) 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 Cls320
MOT pass rate 78% ✓ 73%
MOT failure rate 22% ✓ 27%
Faults & advisories per test 1.7 ✓ 1.9
Dangerous-fault share 3% ✓ 8%
Average mileage 112,156 mi 135,666 mi
Sample size (vehicles) 675,043 2

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 Cls320

  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 Front Shock absorber has a light misting of oil (2.7.3)
  4. Offside Front Tyre worn close to the legal limit (4.1.E.1)
  5. nearside front tyre worn slightly on edges
  6. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))

Reliability FAQ

On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz Cls320 (73%) 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 Cls320 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.