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Mercedes-benz A-class vs Mercedes-benz E 400: 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 E 400
83%
MOT pass rate · 3 vehicles
Verdict: On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz E 400 (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz A-class Mercedes-benz E 400
MOT pass rate 78% 83% ✓
MOT failure rate 22% 17% ✓
Faults & advisories per test 1.6 0.6 ✓
Dangerous-fault share 3% ✓ 36%
Average mileage 86,210 mi 58,386 mi
Sample size (vehicles) 362,612 3

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 E 400

  1. Offside Front Tyre has a cut but not deep enough to reach the ply or cords (5.2.3 (d) (i))
  2. Nearside Front Brake pad(s) wearing thin (3.5.1g)
  3. Offside Front Brake pad(s) wearing thin (3.5.1g)
  4. Engine cover fitted
  5. Under tray fitted
  6. Offside Front Tyre has ply or cords exposed INNER SHOULDER - 235/35R19 MICHELIN PILOT SPORT 4 S (5.2.3 (d) (ii))

Reliability FAQ

On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz E 400 (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz A-class report Full Mercedes-benz E 400 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.