2018 · 6 years old at test · Petrol mostly

2018 Mercedes-Benz GT MOT pass rate and common faults

291 MOT tests in 2024. 94.8% passed first time, compared with 82.5% for all cars the same age.

115Well above average
Passed first time94.8%
Failed or needed repairs5.1%
Typical mileage at test16,000

Most common reasons for failing

Share of all 291 tests where this item caused a failure.

  1. Tyres - condition: has ply or cords exposed1.0%
    5 marked dangerous
  2. Catalyst emissions: Lambda reading after 2nd fast idle outside specified limits0.7%
  3. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords0.7%
  4. Headlamp aim: too low0.3%
  5. Registration plates: inscription illegible0.3%
  6. Brake discs: fractured0.3%
    2 marked dangerous
  7. Wipers: does not clear the windscreen effectively0.3%
  8. Coil spring: fractured or broken0.3%
  9. Headlamp aim: too high0.3%
  10. Tread depth below requirements of 1.6mm0.3%
    2 marked dangerous

Problem areas

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

  1. Tyres2.1%
  2. Lights & electrics1.0%
  3. Emissions & leaks0.7%
  4. Number plates & VIN0.3%
  5. Brakes0.3%
  6. Visibility (wipers, screen, mirrors)0.3%
  7. Suspension0.3%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm6.2%
  2. Tyres - condition: has a tear, caused by separation or partial failure of its structure3.8%
  3. Non-component advisories: Nail in tyre1.7%
  4. Tread depth: tread pattern not visible over the whole tread area when minimum depth required is 1.0mm1.7%
  5. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords0.7%

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.

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Questions

What is the MOT pass rate for a 2018 Mercedes-Benz GT?

In 2024, 94.8% of 2018 Mercedes-Benz GT cars passed their MOT first time, across 291 tests. The average for all 6-year-old cars was 82.5%.

What are the most common MOT failures on a 2018 Mercedes-Benz GT?

The most common failure reasons were tyres - condition: has ply or cords exposed; catalyst emissions: lambda reading after 2nd fast idle outside specified limits; 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 2018 Mercedes-Benz GT reliable at MOT time?

Its MOT Rank score is 115, which is well above average for a car of its age (100 means exactly average).