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Mercedes-benz A-class vs Mercedes-benz Mb 100d: 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 Mb 100d
60%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz Mb 100d (60%) 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 Mb 100d
MOT pass rate 78% ✓ 60%
MOT failure rate 22% ✓ 40%
Faults & advisories per test 1.6 ✓ 2.6
Dangerous-fault share 3% 0% ✓
Average mileage 86,210 mi 237,968 mi
Sample size (vehicles) 362,612 2

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 Mb 100d

  1. Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))
  2. Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c))
  3. Brake lever has insufficient reserve travel (1.1.2 (a))
  4. Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
  5. Indicator tell-tale inoperative (4.9.1 (a) (i))
  6. Nearside Rear Service brake lagging in operation (1.2.1 (d))

Reliability FAQ

On MOT pass rate the Mercedes-benz A-class (78%) and Mercedes-benz Mb 100d (60%) 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 Mb 100d 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.