2015 · 9 years old at test · Diesel mostly

2015 Mercedes-Benz C-Class MOT pass rate and common faults

34,151 MOT tests in 2024. 78.7% passed first time, compared with 73.5% for all cars the same age.

107Above average
Passed first time78.7%
Failed or needed repairs21.3%
Typical mileage at test80,000

Most common reasons for failing

Share of all 34,151 tests where this item caused a failure.

  1. Tread depth below requirements of 1.6mm3.5%
    2,035 marked dangerous
  2. Malfunction indicator lamp: inoperative or indicates a malfunction3.5%
  3. Suspension arms - ball joint: ball joint excessively worn3.0%
  4. Coil spring: fractured or broken2.9%
  5. Tyres - condition: has ply or cords exposed1.7%
    806 marked dangerous
  6. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.4%
  7. Brake pads: less than 1.5 mm thick1.3%
    614 marked dangerous
  8. Headlamp aim: too low0.7%
  9. Suspension arms - ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt0.6%

Problem areas

Failure items found per 100 tests, by part of the car.

  1. Tyres9.1%
  2. Suspension7.7%
  3. Brakes4.3%
  4. Emissions & leaks3.8%
  5. Lights & electrics3.6%
  6. Visibility (wipers, screen, mirrors)2.1%
  7. Wheels0.7%
  8. Seat belts & airbags0.5%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm19.7%
  2. Brake discs: in such a condition that it is seriously weakened8.4%
  3. Brake pads: less than 1.5 mm thick7.9%
  4. Suspension arms - ball joint: ball joint excessively worn5.8%
  5. Tyres - condition: has a tear, caused by separation or partial failure of its structure3.9%

What this means if you are buying one

This model year does better than most cars its age, so it is a reasonable used buy on MOT record alone. Before buying, check the area that fails most: tread depth below requirements of 1.6mm. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

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Questions

What is the MOT pass rate for a 2015 Mercedes-Benz C-Class?

In 2024, 78.7% of 2015 Mercedes-Benz C-Class cars passed their MOT first time, across 34,151 tests. The average for all 9-year-old cars was 73.5%.

What are the most common MOT failures on a 2015 Mercedes-Benz C-Class?

The most common failure reasons were tread depth below requirements of 1.6mm; malfunction indicator lamp: inoperative or indicates a malfunction; suspension arms - ball joint: ball joint excessively worn. The biggest problem area was tyres.

Is the 2015 Mercedes-Benz C-Class reliable at MOT time?

Its MOT Rank score is 107, which is above average for a car of its age (100 means exactly average).