2018 · 6 years old at test · Petrol mostly

2018 Mercedes-Benz CLA MOT pass rate and common faults

8,249 MOT tests in 2024. 81.6% passed first time, compared with 82.5% for all cars the same age.

99About average
Passed first time81.6%
Failed or needed repairs18.4%
Typical mileage at test49,000

Most common reasons for failing

Share of all 8,249 tests where this item caused a failure.

  1. Tyres - condition: has ply or cords exposed2.4%
    275 marked dangerous
  2. Tread depth below requirements of 1.6mm2.3%
    321 marked dangerous
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.2%
  4. Brake pads: less than 1.5 mm thick1.6%
    178 marked dangerous
  5. Tyres - condition: has a bulge, caused by separation or partial failure of its structure1.4%
    147 marked dangerous
  6. Malfunction indicator lamp: inoperative or indicates a malfunction1.2%
  7. Washers: provides insufficient washer liquid1.0%
  8. Wipers: does not clear the windscreen effectively0.9%
  9. Road Wheels - condition: fractured0.8%
    82 marked dangerous
  10. Tyres - condition: has a tear, caused by separation or partial failure of its structure0.7%
    75 marked dangerous

Problem areas

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

  1. Tyres10.9%
  2. Visibility (wipers, screen, mirrors)3.7%
  3. Brakes3.6%
  4. Lights & electrics2.9%
  5. Emissions & leaks1.7%
  6. Wheels1.3%
  7. Suspension1.1%
  8. Body & chassis0.6%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm17.5%
  2. Brake pads: less than 1.5 mm thick9.1%
  3. Tyres - condition: has a tear, caused by separation or partial failure of its structure8.1%
  4. Brake discs: in such a condition that it is seriously weakened8.0%
  5. Brake discs: significantly and obviously worn3.7%

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 2018 Mercedes-Benz CLA?

In 2024, 81.6% of 2018 Mercedes-Benz CLA cars passed their MOT first time, across 8,249 tests. The average for all 6-year-old cars was 82.5%.

What are the most common MOT failures on a 2018 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 2018 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).