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Mercedes-benz E vs Mercedes-benz Slk300: reliability comparison

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

Mercedes-benz E
79%
MOT pass rate · 429,719 vehicles
Mercedes-benz Slk300
88%
MOT pass rate · 5 vehicles
Verdict: On MOT pass rate the Mercedes-benz E (79%) and Mercedes-benz Slk300 (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Head to head

Measure Mercedes-benz E Mercedes-benz Slk300
MOT pass rate 79% 88% ✓
MOT failure rate 21% 12% ✓
Faults & advisories per test 1.6 0.9 ✓
Dangerous-fault share 3% 0% ✓
Average mileage 124,278 mi 49,863 mi
Sample size (vehicles) 429,719 5

Most common faults

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)

Mercedes-benz Slk300

  1. Under-trays fitted obscuring some underside components
  2. Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  3. Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
  4. Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
  5. Engine covers fitted obscuring some components in the engine bay
  6. Offside Rear Direction indicator slightly discoloured (1.4.A.2f)

Reliability FAQ

On MOT pass rate the Mercedes-benz E (79%) and Mercedes-benz Slk300 (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.

Full Mercedes-benz E report Full Mercedes-benz Slk300 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.