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Mercedes-benz A-class vs Mercedes-benz C 300 amg ln ngt ed prm + de 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 amg ln ngt ed prm + de a
85%
MOT pass rate · 266 vehicles
More reliable
Verdict: On MOT pass rate, the Mercedes-benz C 300 amg ln ngt ed prm + de a is the more reliable of the two — 85% 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 amg ln ngt ed prm + de a
MOT pass rate 78% 85% ✓
MOT failure rate 22% 15% ✓
Faults & advisories per test 1.6 1.1 ✓
Dangerous-fault share 3% ✓ 8%
Average mileage 86,210 mi 62,173 mi
Sample size (vehicles) 362,612 266

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 amg ln ngt ed prm + de a

  1. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  2. Offside 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. Nearside Front Road wheel slightly distorted (5.2.2 (c) (i))
  6. Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))

Reliability FAQ

On MOT pass rate, the Mercedes-benz C 300 amg ln ngt ed prm + de a is the more reliable of the two — 85% 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 amg ln ngt ed prm + de 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.