2017 · 7 years old at test · Diesel mostly

2017 Mercedes-Benz CLA MOT pass rate and common faults

8,133 MOT tests in 2024. 78.9% passed first time, compared with 79.8% for all cars the same age.

99About average
Passed first time78.9%
Failed or needed repairs21.1%
Typical mileage at test61,000

Most common reasons for failing

Share of all 8,133 tests where this item caused a failure.

  1. Tyres - condition: has ply or cords exposed2.6%
    298 marked dangerous
  2. Tread depth below requirements of 1.6mm2.6%
    339 marked dangerous
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.1%
  4. Malfunction indicator lamp: inoperative or indicates a malfunction2.1%
  5. Brake pads: less than 1.5 mm thick2.1%
    231 marked dangerous
  6. Coil spring: fractured or broken1.8%
  7. Washers: provides insufficient washer liquid1.2%
  8. Tyres - condition: has a bulge, caused by separation or partial failure of its structure1.2%
    135 marked dangerous
  9. Wipers: does not clear the windscreen effectively1.0%
  10. Tyres - condition: has a tear, caused by separation or partial failure of its structure0.7%
    85 marked dangerous

Problem areas

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

  1. Tyres11.2%
  2. Brakes4.4%
  3. Visibility (wipers, screen, mirrors)4.0%
  4. Suspension3.2%
  5. Lights & electrics3.0%
  6. Emissions & leaks2.9%
  7. Wheels1.3%
  8. Seat belts & airbags0.6%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm17.8%
  2. Brake pads: less than 1.5 mm thick9.5%
  3. Brake discs: in such a condition that it is seriously weakened9.0%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure7.3%
  5. Brake discs: significantly and obviously worn4.1%

What this means if you are buying one

This model year is about as good as an average car its age. Before buying, check the area that fails most: tyres - condition: has ply or cords exposed. 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 2017 Mercedes-Benz CLA?

In 2024, 78.9% of 2017 Mercedes-Benz CLA cars passed their MOT first time, across 8,133 tests. The average for all 7-year-old cars was 79.8%.

What are the most common MOT failures on a 2017 Mercedes-Benz CLA?

The most common failure reasons were tyres - condition: has ply or cords exposed; tread depth below requirements of 1.6mm; tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords. The biggest problem area was tyres.

Is the 2017 Mercedes-Benz CLA reliable at MOT time?

Its MOT Rank score is 99, which is about average for a car of its age (100 means exactly average).