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Mercedes-benz A-class vs Mercedes-benz Amg a 45 s 4matic+ plus auto: 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 Amg a 45 s 4matic+ plus auto
88%
MOT pass rate · 2,247 vehicles
More reliable
Verdict: On MOT pass rate, the Mercedes-benz Amg a 45 s 4matic+ plus auto is the more reliable of the two — 88% 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 Amg a 45 s 4matic+ plus auto
MOT pass rate 78% 88% ✓
MOT failure rate 22% 12% ✓
Faults & advisories per test 1.6 0.6 ✓
Dangerous-fault share 3% ✓ 14%
Average mileage 86,210 mi 29,513 mi
Sample size (vehicles) 362,612 2,247

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 Amg a 45 s 4matic+ plus auto

  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. Nearside Front Tyre has ply or cords exposed (5.2.3 (d) (ii))
  4. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Windscreen damaged but not adversely affecting driver's view (3.2 (a) (i))
  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 Amg a 45 s 4matic+ plus auto is the more reliable of the two — 88% 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 Amg a 45 s 4matic+ plus auto 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.