2020 · 4 years old at test · Petrol mostly

2020 Mercedes-Benz G-Class MOT pass rate and common faults

406 MOT tests in 2024. 92.6% passed first time, compared with 86.9% for all cars the same age.

107Above average
Passed first time92.6%
Failed or needed repairs7.4%
Typical mileage at test30,000

Most common reasons for failing

Share of all 406 tests where this item caused a failure.

  1. Registration plates: does not conform to the specified requirements1.7%
  2. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.5%
  3. Malfunction indicator lamp: inoperative or indicates a malfunction1.0%
  4. Windscreen: damaged and affecting the driver's view of the road0.5%
  5. Headlamp aim: too high0.2%
  6. Tread depth below requirements of 1.6mm0.2%
    3 marked dangerous
  7. Rbt (sp): efficiency below requirements0.2%
  8. Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits0.2%

Problem areas

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

  1. Tyres2.2%
  2. Number plates & VIN2.0%
  3. Emissions & leaks1.5%
  4. Lights & electrics1.2%
  5. Brakes1.0%
  6. Visibility (wipers, screen, mirrors)0.5%
  7. Seat belts & airbags0.2%
  8. Suspension0.2%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm7.9%
  2. Brake pads: less than 1.5 mm thick4.2%
  3. Tyres - condition: has a tear, caused by separation or partial failure of its structure2.2%
  4. Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm1.7%
  5. Non-component advisories: Nail in tyre1.5%

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: registration plates: does not conform to the specified requirements. 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 G-Class?

In 2024, 92.6% of 2020 Mercedes-Benz G-Class cars passed their MOT first time, across 406 tests. The average for all 4-year-old cars was 86.9%.

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

The most common failure reasons were registration plates: does not conform to the specified requirements; tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords; malfunction indicator lamp: inoperative or indicates a malfunction. The biggest problem area was tyres.

Is the 2020 Mercedes-Benz G-Class reliable at MOT time?

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