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Mercedes-benz A-class vs Mercedes-benz Ml 320 cdi: 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 Ml 320 cdi
90%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz Ml 320 cdi (90%) 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 Ml 320 cdi
MOT pass rate 78% 90% ✓
MOT failure rate 22% 10% ✓
Faults & advisories per test 1.6 1.0 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 86,210 mi 134,873 mi
Sample size (vehicles) 362,612 1

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 Ml 320 cdi

  1. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  2. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Oil leak Engine area
  4. Offside Front constant velocity joint gaiter deteriorated, but preventing the ingress of dirt (2.5.C.1a)
  5. nearside rear tyre worn inner edge
  6. Offside Front constant velocity joint gaiter damaged, but preventing the ingress of dirt (2.5.C.1a)

Reliability FAQ

On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz Ml 320 cdi (90%) 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 Ml 320 cdi 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.