2020 · 4 years old at test · Diesel mostly

2020 Mercedes-Benz GLC MOT pass rate and common faults

11,361 MOT tests in 2024. 90.3% passed first time, compared with 86.9% for all cars the same age.

104Above average
Passed first time90.3%
Failed or needed repairs9.7%
Typical mileage at test34,000

Most common reasons for failing

Share of all 11,361 tests where this item caused a failure.

  1. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.2%
  2. Tread depth below requirements of 1.6mm1.4%
    250 marked dangerous
  3. Tyres - condition: has ply or cords exposed1.3%
    223 marked dangerous
  4. Suspension arms - ball joint: ball joint excessively worn0.7%
  5. Brake pads: less than 1.5 mm thick0.7%
    105 marked dangerous
  6. Brake pads: worn down to wear indicator0.6%
  7. Headlamp aim: too low0.4%
  8. Wipers: does not clear the windscreen effectively0.3%
  9. Tyres - condition: has a bulge, caused by separation or partial failure of its structure0.3%
    33 marked dangerous
  10. Headlamp aim: too high0.3%

Problem areas

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

  1. Tyres6.0%
  2. Brakes1.7%
  3. Visibility (wipers, screen, mirrors)1.3%
  4. Lights & electrics0.9%
  5. Suspension0.8%
  6. Number plates & VIN0.3%
  7. Emissions & leaks0.3%
  8. Seat belts & airbags0.2%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm14.9%
  2. Brake pads: less than 1.5 mm thick6.8%
  3. Tyres - condition: has a tear, caused by separation or partial failure of its structure3.9%
  4. Non-component advisories: Child Seat fitted not allowing full inspection of adult belt3.1%
  5. Suspension arms - ball joint: ball joint excessively worn2.9%

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 cut in excess of the requirements deep enough to reach the ply or cords. 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 GLC?

In 2024, 90.3% of 2020 Mercedes-Benz GLC cars passed their MOT first time, across 11,361 tests. The average for all 4-year-old cars was 86.9%.

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

The most common failure reasons were tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords; tread depth below requirements of 1.6mm; tyres - condition: has ply or cords exposed. The biggest problem area was tyres.

Is the 2020 Mercedes-Benz GLC reliable at MOT time?

Its MOT Rank score is 104, which is above average for a car of its age (100 means exactly average).