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2020 Mercedes-Benz C-Class: MOT pass rate and common faults

10,167 initial MOT tests in 2025 on cars first used in 2020 · DVSA data · For guidance only · How we count

85.8%passed first time

Share of initial MOT tests passed with no repairs. Repairs made at the test centre count as a fail. 95% range 85.1% to 86.4% (±0.7 points).

That is about average: the difference from the average for all vehicles first used in 2020 (86.0%) is within the margin of error. These cars were about 5 years old at the test.

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Failure areas compared with all 2020 vehicles

Compared with all vehicles first used in 2020, failures are more common in tyres (1.6×), and less common in brakes (0.6×), windscreen, wipers, mirrors (0.5×) and lights and electrics (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 2020.

  1. Tyres8.4 in 100 tests1.6× compared with 5.1 in 100 for all vehicles first used in 2020
  2. Suspension2.1 in 100 tests– no reliable figure for all vehicles first used in 2020
  3. Brakes1.4 in 100 tests0.6× compared with 2.4 in 100 for all vehicles first used in 2020
  4. Windscreen, wipers, mirrors1.4 in 100 tests0.5× compared with 2.8 in 100 for all vehicles first used in 2020
  5. Lights and electrics1.3 in 100 tests0.5× compared with 3.0 in 100 for all vehicles first used in 2020
  6. Wheels1.0 in 100 tests– no reliable figure for all vehicles first used in 2020

All vehicles first used in 2020: the 212 models in our data, 1,688,603 tests (96.0% of all 1,758,903 tests on vehicles first used in 2020). 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 test41,000

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 2020 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 2020

Check a 2020 C-Class you're looking at