2020 · 4 years old at test · Petrol mostly

2020 Mercedes-Benz SL MOT pass rate and common faults

208 MOT tests in 2024. 92.8% passed first time, compared with 86.9% for all cars the same age.

107Above average
Passed first time92.8%
Failed or needed repairs7.2%
Typical mileage at test15,000

Most common reasons for failing

Share of all 208 tests where this item caused a failure.

  1. Tyres - condition: has a bulge, caused by separation or partial failure of its structure2.4%
    7 marked dangerous
  2. Road Wheels - condition: fractured1.0%
    2 marked dangerous
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.0%
  4. Tread depth below requirements of 1.6mm0.5%
    12 marked dangerous
  5. Rear fog lamp: light intensity significantly reduced0.5%
  6. Rbt (sp): efficiency below requirements0.5%
  7. Windscreen: damaged and affecting the driver's view of the road0.5%
  8. Individual direction indicators: not working0.5%
  9. Tyres - condition: has a lump, caused by separation or partial failure of its structure0.5%
    1 marked dangerous

Problem areas

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

  1. Tyres4.3%
  2. Wheels1.0%
  3. Lights & electrics1.0%
  4. Brakes0.5%
  5. Visibility (wipers, screen, mirrors)0.5%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm4.3%
  2. Tyres - condition: has a tear, caused by separation or partial failure of its structure3.4%
  3. Non-component advisories: Nail in tyre1.4%
  4. Tyres - condition: has a bulge, caused by separation or partial failure of its structure1.4%
  5. Brake discs: in such a condition that it is seriously weakened1.0%

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 a bulge, caused by separation or partial failure of its structure. 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 2020 Mercedes-Benz SL?

In 2024, 92.8% of 2020 Mercedes-Benz SL cars passed their MOT first time, across 208 tests. The average for all 4-year-old cars was 86.9%.

What are the most common MOT failures on a 2020 Mercedes-Benz SL?

The most common failure reasons were tyres - condition: has a bulge, caused by separation or partial failure of its structure; road wheels - condition: fractured; 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 2020 Mercedes-Benz SL reliable at MOT time?

Its MOT Rank score is 107, which is above average for a car of its age (100 means exactly average).