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Mercedes-benz C vs Mercedes-benz L406: reliability comparison

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

Mercedes-benz C
78%
MOT pass rate · 675,043 vehicles
Mercedes-benz L406
50%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz L406 (50%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz C Mercedes-benz L406
MOT pass rate 78% ✓ 50%
MOT failure rate 22% ✓ 50%
Faults & advisories per test 1.7 ✓ 11.0
Dangerous-fault share 3% 0% ✓
Average mileage 112,156 mi 148,485 mi
Sample size (vehicles) 675,043 1

Most common faults

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)

Mercedes-benz L406

  1. Nearside Front Brake pipe slightly corroded (3.6.B.2c)
  2. Nearside Front wheel bearing has slight play (2.5.A.3c)
  3. Offside Front Brake pipe slightly corroded (3.6.B.2c)
  4. Offside Front Seat belt damaged but webbing not significantly weakened (5.2.2a)
  5. Offside Front wheel bearing has slight play (2.5.A.3c)
  6. Offside rear inner tyre flat.

Reliability FAQ

On MOT pass rate the Mercedes-benz C (78%) and Mercedes-benz L406 (50%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz C report Full Mercedes-benz L406 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.