2014 · 10 years old at test · Diesel mostly

2014 Mercedes-Benz S-Class MOT pass rate and common faults

1,594 MOT tests in 2024. 87.1% passed first time, compared with 69.9% for all cars the same age.

125Well above average
Passed first time87.1%
Failed or needed repairs12.9%
Typical mileage at test85,000

Most common reasons for failing

Share of all 1,594 tests where this item caused a failure.

  1. Tread depth below requirements of 1.6mm2.3%
    63 marked dangerous
  2. Suspension arms - ball joint: ball joint excessively worn1.9%
  3. Malfunction indicator lamp: inoperative or indicates a malfunction1.8%
  4. Tyres - condition: has ply or cords exposed1.1%
    32 marked dangerous
  5. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords1.1%
  6. Washers: provides insufficient washer liquid0.9%
  7. Seat belts - condition: retracting mechanism defective0.4%
  8. Tyre pressure monitoring system: malfunctioning or obviously inoperative0.4%

Problem areas

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

  1. Tyres6.1%
  2. Suspension2.9%
  3. Emissions & leaks2.1%
  4. Visibility (wipers, screen, mirrors)1.8%
  5. Lights & electrics1.7%
  6. Seat belts & airbags1.3%
  7. Brakes1.3%
  8. Body & chassis0.6%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm13.6%
  2. Suspension arms - ball joint: ball joint excessively worn6.0%
  3. Brake discs: in such a condition that it is seriously weakened4.8%
  4. Brake pads: less than 1.5 mm thick4.3%
  5. Brake discs: significantly and obviously worn4.2%

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: tread depth below requirements of 1.6mm. Then look up the car's own MOT history on GOV.UK with its number plate, and look for repeat advisories.

← 2013 S-ClassAll S-Class years2015 S-Class →

Questions

What is the MOT pass rate for a 2014 Mercedes-Benz S-Class?

In 2024, 87.1% of 2014 Mercedes-Benz S-Class cars passed their MOT first time, across 1,594 tests. The average for all 10-year-old cars was 69.9%.

What are the most common MOT failures on a 2014 Mercedes-Benz S-Class?

The most common failure reasons were tread depth below requirements of 1.6mm; suspension arms - ball joint: ball joint excessively worn; malfunction indicator lamp: inoperative or indicates a malfunction. The biggest problem area was tyres.

Is the 2014 Mercedes-Benz S-Class reliable at MOT time?

Its MOT Rank score is 125, which is well above average for a car of its age (100 means exactly average).