2021 · 3 years old at test · Petrol mostly

2021 Mercedes-Benz SLC MOT pass rate and common faults

191 MOT tests in 2024. 92.2% passed first time, compared with 87.6% for all cars the same age.

105Above average
Passed first time92.2%
Failed or needed repairs7.9%
Typical mileage at test13,000

Most common reasons for failing

Share of all 191 tests where this item caused a failure.

  1. Tyres - condition: has ply or cords exposed1.6%
    5 marked dangerous
  2. Suspension arms - ball joint: ball joint excessively worn1.0%
  3. SRS malfunction indicator lamp: warning lamp indicates a fault0.5%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure0.5%
    2 marked dangerous
  5. Headlamp: lens seriously defective0.5%
  6. Headlamp aim: too high0.5%
  7. Headlamp aim: too far to the right0.5%
  8. Registration plates: insecure0.5%
  9. Headlamp aim: too low0.5%
  10. Other body component: component insecure0.5%

Problem areas

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

  1. Tyres3.1%
  2. Lights & electrics2.1%
  3. Suspension1.6%
  4. Seat belts & airbags0.5%
  5. Number plates & VIN0.5%
  6. Body & chassis0.5%
  7. Emissions & leaks0.5%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tyres - condition: has a tear, caused by separation or partial failure of its structure9.4%
  2. Tread depth below requirements of 1.6mm5.8%
  3. Non-component advisories: Nail in tyre1.6%
  4. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.6%
  5. Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm1.0%

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: 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.

← 2020 SLCAll SLC years

Questions

What is the MOT pass rate for a 2021 Mercedes-Benz SLC?

In 2024, 92.2% of 2021 Mercedes-Benz SLC cars passed their MOT first time, across 191 tests. The average for all 3-year-old cars was 87.6%.

What are the most common MOT failures on a 2021 Mercedes-Benz SLC?

The most common failure reasons were tyres - condition: has ply or cords exposed; suspension arms - ball joint: ball joint excessively worn; srs malfunction indicator lamp: warning lamp indicates a fault. The biggest problem area was tyres.

Is the 2021 Mercedes-Benz SLC reliable at MOT time?

Its MOT Rank score is 105, which is above average for a car of its age (100 means exactly average).