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2017 Mercedes-Benz C-Class: MOT pass rate and common faults

39,538 initial MOT tests in 2025 on cars first used in 2017 · DVSA data · For guidance only · How we count

81.6%passed first time

Share of initial MOT tests passed with no repairs. Repairs made at the test centre count as a fail. 95% range 81.3% to 82.0% (±0.4 points).

That is 3.4 points above the average for all vehicles first used in 2017 (78.2%). These cars were about 8 years old at the test.

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Failure areas compared with all 2017 vehicles

Compared with all vehicles first used in 2017, failures are more common in tyres (1.3×) and noise, emissions, leaks (1.4×), and less common in suspension (0.9×), lights and electrics (0.4×), brakes (0.5×) and windscreen, wipers, mirrors (0.6×). Other differences are within the margin of error.

Failed tests with a fault in each area, per 100 tests. The right-hand column shows how many times as often as all vehicles first used in 2017.

  1. Tyres7.5 in 100 tests1.3× compared with 5.9 in 100 for all vehicles first used in 2017
  2. Suspension5.3 in 100 tests0.9× compared with 5.7 in 100 for all vehicles first used in 2017
  3. Noise, emissions, leaks2.7 in 100 tests1.4× compared with 2.0 in 100 for all vehicles first used in 2017
  4. Lights and electrics2.1 in 100 tests0.4× compared with 5.9 in 100 for all vehicles first used in 2017
  5. Brakes1.9 in 100 tests0.5× compared with 4.2 in 100 for all vehicles first used in 2017
  6. Windscreen, wipers, mirrors1.9 in 100 tests0.6× compared with 3.3 in 100 for all vehicles first used in 2017
  7. Wheels0.9 in 100 tests– no reliable figure for all vehicles first used in 2017
  8. Body, chassis, structure0.5 in 100 tests– no reliable figure for all vehicles first used in 2017
  9. Number plates and VIN0.4 in 100 tests– no reliable figure for all vehicles first used in 2017
  10. Seat belts and airbags0.3 in 100 tests– no reliable figure for all vehicles first used in 2017
  11. Steering0.1 in 100 tests– no reliable figure for all vehicles first used in 2017

All vehicles first used in 2017: the 240 models in our data, 2,515,956 tests (97.6% of all 2,578,403 tests on vehicles first used in 2017). Areas with fewer than 50 failures in a model aren't published, so an area is only compared when that leaves the all-vehicles figure at most 10% short; otherwise it shows –.

Typical mileage at test64,700

Median odometer reading at the 2025 MOT test, in miles. Half had more and half had less.

What MOT data can't tell you about any 2017 Mercedes-Benz C-Class

Outstanding finance, write-offs, theft and plate changes aren't in MOT records. For a particular car, you need a history check.

Compare history checksWhat MOT history doesn't show

Other Mercedes-Benz C-Class years

Mercedes-Benz C-Class: every year, common faults and what to check

Other cars first used in 2017

Check a 2017 C-Class you're looking at