2014 · 10 years old at test · Diesel mostly

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

8,215 MOT tests in 2024. 74.0% passed first time, compared with 69.9% for all cars the same age.

106Above average
Passed first time74.0%
Failed or needed repairs26.0%
Typical mileage at test69,000

Most common reasons for failing

Share of all 8,215 tests where this item caused a failure.

  1. Coil spring: fractured or broken3.1%
  2. Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt2.9%
  3. Registration plate lamp(s): inoperative in the case of a single lamp or all lamps2.7%
  4. Malfunction indicator lamp: inoperative or indicates a malfunction2.6%
  5. Tyres - condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.2%
  6. Brake pads: less than 1.5 mm thick1.9%
    200 marked dangerous
  7. Tyres - condition: has ply or cords exposed1.7%
    168 marked dangerous
  8. Tread depth below requirements of 1.6mm1.6%
    197 marked dangerous
  9. SRS malfunction indicator lamp: warning lamp indicates a fault1.4%
  10. Anti-roll bars - ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt1.3%

Problem areas

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

  1. Lights & electrics11.4%
  2. Tyres8.9%
  3. Suspension8.6%
  4. Brakes4.5%
  5. Emissions & leaks3.5%
  6. Visibility (wipers, screen, mirrors)3.0%
  7. Seat belts & airbags2.0%
  8. Wheels0.7%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Tread depth below requirements of 1.6mm15.5%
  2. Tyres - condition: has a tear, caused by separation or partial failure of its structure9.6%
  3. Brake pads: less than 1.5 mm thick8.4%
  4. Brake discs: in such a condition that it is seriously weakened8.1%
  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: coil spring: fractured or broken. 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 2014 Mercedes-Benz B-Class?

In 2024, 74.0% of 2014 Mercedes-Benz B-Class cars passed their MOT first time, across 8,215 tests. The average for all 10-year-old cars was 69.9%.

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

The most common failure reasons were coil spring: fractured or broken; linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt; registration plate lamp(s): inoperative in the case of a single lamp or all lamps. The biggest problem area was lights & electrics.

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

Its MOT Rank score is 106, which is above average for a car of its age (100 means exactly average).