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Mercedes-benz A-class vs Mercedes-benz C 300 e amg line premium + a: reliability comparison

MOT pass rates, common faults and mileage compared from real UK MOT data.

Mercedes-benz A-class
78%
MOT pass rate · 362,612 vehicles
Mercedes-benz C 300 e amg line premium + a
92%
MOT pass rate · 1,581 vehicles
More reliable
Verdict: On MOT pass rate, the Mercedes-benz C 300 e amg line premium + a is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Head to head

Measure Mercedes-benz A-class Mercedes-benz C 300 e amg line premium + a
MOT pass rate 78% 92% ✓
MOT failure rate 22% 8% ✓
Faults & advisories per test 1.6 0.6 ✓
Dangerous-fault share 3% ✓ 11%
Average mileage 86,210 mi 37,298 mi
Sample size (vehicles) 362,612 1,581

Most common faults

Mercedes-benz A-class

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

Mercedes-benz C 300 e amg line premium + a

  1. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  3. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
  6. Rear Registration plate deteriorated but not likely to be misread (0.1 (b))

Reliability FAQ

On MOT pass rate, the Mercedes-benz C 300 e amg line premium + a is the more reliable of the two — 92% pass first time versus 78%. It's one signal among several; check the full breakdown below.

Full Mercedes-benz A-class report Full Mercedes-benz C 300 e amg line premium + a 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.