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Mercedes-benz 511cdi vs Mercedes-benz E: reliability comparison

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

Mercedes-benz 511cdi
73%
MOT pass rate · 1 vehicles
Mercedes-benz E
79%
MOT pass rate · 429,719 vehicles
Verdict: On MOT pass rate the Mercedes-benz 511cdi (73%) and Mercedes-benz E (79%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz 511cdi Mercedes-benz E
MOT pass rate 73% 79% ✓
MOT failure rate 27% 21% ✓
Faults & advisories per test 0.7 ✓ 1.6
Dangerous-fault share 25% 3% ✓
Average mileage 85,992 mi 124,278 mi
Sample size (vehicles) 1 429,719

Most common faults

Mercedes-benz 511cdi

  1. Parking brake efficiency below requirements (1.4.2 (a) (i))
  2. Nearside Rear Brake pipe corroded, covered in grease or other material (1.1.11 (c))
  3. Fuel system component leaking (6.1.3 (b) (i))
  4. Nearside Front Tyre over ten years old is fitted to a front axle of a bus or coach (5.2.3 (m))
  5. Nearside Rear Inner Tyre over ten years old fitted to a rear axle of a bus (5.2.3 (m))
  6. Nearside Rear Inner Tyre tread pattern not visible over the whole tread area when minimum depth required is 1.0mm (5.2.3 (e))

Mercedes-benz E

  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. Nearside Front Tyre worn close to the legal limit (4.1.E.1)
  6. Offside Front Tyre worn close to the legal limit (4.1.E.1)

Reliability FAQ

On MOT pass rate the Mercedes-benz 511cdi (73%) and Mercedes-benz E (79%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz 511cdi report Full Mercedes-benz E 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.