2015 · 9 years old at test · Diesel mostly

2015 Mercedes-Benz SLK MOT pass rate and common faults

4,797 MOT tests in 2024. 80.6% passed first time, compared with 73.5% for all cars the same age.

110Well above average
Passed first time80.6%
Failed or needed repairs19.4%
Typical mileage at test45,000

Most common reasons for failing

Share of all 4,797 tests where this item caused a failure.

  1. Coil spring: fractured or broken3.6%
  2. Tyres - condition: has ply or cords exposed2.7%
    191 marked dangerous
  3. Tread depth below requirements of 1.6mm2.4%
    197 marked dangerous
  4. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.9%
  5. Suspension arms - ball joint: ball joint excessively worn1.2%
  6. Malfunction indicator lamp: inoperative or indicates a malfunction1.0%
  7. Anti-lock braking system: warning lamp indicates an ABS fault1.0%
  8. Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt1.0%
  9. Tyres - condition: has a tear, caused by separation or partial failure of its structure0.8%
    62 marked dangerous
  10. Electronic stability control: warning lamp indicates a fault0.6%

Problem areas

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

  1. Tyres9.8%
  2. Suspension8.3%
  3. Brakes3.4%
  4. Lights & electrics2.9%
  5. Emissions & leaks1.5%
  6. Visibility (wipers, screen, mirrors)1.1%
  7. Wheels0.4%
  8. Seat belts & airbags0.2%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm16.3%
  2. Brake discs: in such a condition that it is seriously weakened6.5%
  3. Tyres - condition: has a tear, caused by separation or partial failure of its structure6.3%
  4. Brake pads: less than 1.5 mm thick3.6%
  5. Brake discs: significantly and obviously worn3.0%

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: coil spring: fractured or broken. 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 SLK?

In 2024, 80.6% of 2015 Mercedes-Benz SLK cars passed their MOT first time, across 4,797 tests. The average for all 9-year-old cars was 73.5%.

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

The most common failure reasons were coil spring: fractured or broken; tyres - condition: has ply or cords exposed; tread depth below requirements of 1.6mm. The biggest problem area was tyres.

Is the 2015 Mercedes-Benz SLK reliable at MOT time?

Its MOT Rank score is 110, which is well above average for a car of its age (100 means exactly average).