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Mercedes-benz Auto-sleeper vs Mercedes-benz C: reliability comparison

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

Mercedes-benz Auto-sleeper
91%
MOT pass rate · 2 vehicles
Mercedes-benz C
78%
MOT pass rate · 675,043 vehicles
Verdict: On MOT pass rate the Mercedes-benz Auto-sleeper (91%) and Mercedes-benz C (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz Auto-sleeper Mercedes-benz C
MOT pass rate 91% ✓ 78%
MOT failure rate 9% ✓ 22%
Faults & advisories per test 0.1 ✓ 1.7
Dangerous-fault share 0% ✓ 3%
Average mileage 16,005 mi 112,156 mi
Sample size (vehicles) 2 675,043

Most common faults

Mercedes-benz Auto-sleeper

  1. COVID-19 6 MONTH EXTENSION
  2. Nearside Headlamp aim too far to the left (4.1.2 (a))

Mercedes-benz C

  1. Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
  2. Offside Rear Tyre worn close to the legal limit (4.1.E.1)
  3. Offside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  4. Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Under-trays fitted obscuring some underside components
  6. Nearside Front Tyre worn close to the legal limit (4.1.E.1)

Reliability FAQ

On MOT pass rate the Mercedes-benz Auto-sleeper (91%) and Mercedes-benz C (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz Auto-sleeper report Full Mercedes-benz C 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.