2017 · 7 years old at test · Diesel mostly

2017 Mercedes-Benz CLS MOT pass rate and common faults

1,453 MOT tests in 2024. 79.6% passed first time, compared with 79.8% for all cars the same age.

100About average
Passed first time79.6%
Failed or needed repairs20.4%
Typical mileage at test56,000

Most common reasons for failing

Share of all 1,453 tests where this item caused a failure.

  1. Tyres - condition: has ply or cords exposed3.0%
    59 marked dangerous
  2. Tyres - condition: has a bulge, caused by separation or partial failure of its structure2.6%
    47 marked dangerous
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.4%
  4. Tread depth below requirements of 1.6mm2.2%
    55 marked dangerous
  5. Coil spring: fractured or broken2.0%
  6. Malfunction indicator lamp: inoperative or indicates a malfunction1.7%
  7. Road Wheels - condition: fractured1.0%
    20 marked dangerous
  8. Headlamp aim: too high0.8%
  9. Brake pads: less than 1.5 mm thick0.8%
    15 marked dangerous
  10. Tyres - condition: has a tear, caused by separation or partial failure of its structure0.8%
    14 marked dangerous

Problem areas

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

  1. Tyres12.7%
  2. Brakes3.4%
  3. Suspension3.3%
  4. Emissions & leaks2.5%
  5. Lights & electrics1.9%
  6. Wheels1.7%
  7. Number plates & VIN0.6%
  8. Visibility (wipers, screen, mirrors)0.5%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm16.1%
  2. Brake pads: less than 1.5 mm thick8.3%
  3. Brake discs: in such a condition that it is seriously weakened6.1%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure4.4%
  5. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords4.1%

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.

← 2016 CLSAll CLS years2018 CLS →

Questions

What is the MOT pass rate for a 2017 Mercedes-Benz CLS?

In 2024, 79.6% of 2017 Mercedes-Benz CLS cars passed their MOT first time, across 1,453 tests. The average for all 7-year-old cars was 79.8%.

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

The most common failure reasons were tyres - condition: has ply or cords exposed; tyres - condition: has a bulge, caused by separation or partial failure of its structure; 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 CLS reliable at MOT time?

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