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Mercedes-benz 609d vs Mercedes-benz A-class: reliability comparison

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

Mercedes-benz 609d
70%
MOT pass rate · 4 vehicles
Mercedes-benz A-class
78%
MOT pass rate · 362,612 vehicles
Verdict: On MOT pass rate the Mercedes-benz 609d (70%) and Mercedes-benz A-class (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz 609d Mercedes-benz A-class
MOT pass rate 70% 78% ✓
MOT failure rate 30% 22% ✓
Faults & advisories per test 2.7 1.6 ✓
Dangerous-fault share 0% ✓ 3%
Average mileage 235,154 mi 86,210 mi
Sample size (vehicles) 4 362,612

Most common faults

Mercedes-benz 609d

  1. Nearside Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))
  2. Offside Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt (2.1.3 (g) (i))
  3. Nearside Steering linkage ball joint ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt T.R.E (2.1.3 (g) (i))
  4. Nearside Track rod end ball joint dust cover damaged or deteriorated, but preventing the ingress of dirt deteriorated (2.1.3 (g) (i))
  5. Offside Front Seat belt anchorage prescribed area is excessively corroded Wheel Arch (5.2.6)
  6. Rear Body has slight corrosion (6.1.B.2)

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))

Reliability FAQ

On MOT pass rate the Mercedes-benz 609d (70%) and Mercedes-benz A-class (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz 609d report Full Mercedes-benz A-class 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.