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2018 Mercedes-Benz C-Class: MOT pass rate and common faults

28,374 initial MOT tests in 2025 on cars first used in 2018 · DVSA data · For guidance only · How we count

83.9%passed first time

Share of initial MOT tests passed with no repairs. Repairs made at the test centre count as a fail. 95% range 83.4% to 84.3% (±0.5 points).

That is 3.0 points above the average for all vehicles first used in 2018 (80.9%). These cars were about 7 years old at the test.

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Failure areas compared with all 2018 vehicles

Compared with all vehicles first used in 2018, failures are more common in tyres (1.3×), and less common in brakes (0.5×), lights and electrics (0.3×) and windscreen, wipers, mirrors (0.5×). 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 2018.

  1. Tyres7.3 in 100 tests1.3× compared with 5.5 in 100 for all vehicles first used in 2018
  2. Suspension3.7 in 100 tests1.0× compared with 3.6 in 100 for all vehicles first used in 2018
  3. Noise, emissions, leaks2.1 in 100 tests– no reliable figure for all vehicles first used in 2018
  4. Brakes1.7 in 100 tests0.5× compared with 3.6 in 100 for all vehicles first used in 2018
  5. Lights and electrics1.7 in 100 tests0.3× compared with 5.0 in 100 for all vehicles first used in 2018
  6. Windscreen, wipers, mirrors1.6 in 100 tests0.5× compared with 3.1 in 100 for all vehicles first used in 2018
  7. Wheels0.8 in 100 tests– no reliable figure for all vehicles first used in 2018
  8. Body, chassis, structure0.4 in 100 tests– no reliable figure for all vehicles first used in 2018
  9. Number plates and VIN0.4 in 100 tests– no reliable figure for all vehicles first used in 2018
  10. Seat belts and airbags0.3 in 100 tests– no reliable figure for all vehicles first used in 2018

All vehicles first used in 2018: the 245 models in our data, 2,409,788 tests (97.5% of all 2,471,792 tests on vehicles first used in 2018). 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 test55,300

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 2018 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 2018

Check a 2018 C-Class you're looking at