2010 · 14 years old at test · Petrol mostly

2010 Mercedes-Benz B-Class MOT pass rate and common faults

4,530 MOT tests in 2024. 58.3% passed first time, compared with 59.6% for all cars the same age.

98Below average
Passed first time58.3%
Failed or needed repairs41.7%
Typical mileage at test86,000

Most common reasons for failing

Share of all 4,530 tests where this item caused a failure.

  1. Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt5.2%
  2. Side repeaters: not working4.9%
  3. Suspension arms - ball joint: ball joint excessively worn4.6%
  4. Coil spring: fractured or broken4.2%
  5. Rigid brake pipes: excessively corroded4.0%
  6. Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt3.2%
  7. Malfunction indicator lamp: inoperative or indicates a malfunction3.0%
  8. Headlamp: not working on dipped beam2.7%
  9. Individual direction indicators: incorrect colour2.6%
  10. Shock absorbers: has a serious fluid leak2.6%

Problem areas

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

  1. Lights & electrics27.1%
  2. Suspension18.9%
  3. Brakes18.5%
  4. Body & chassis8.2%
  5. Visibility (wipers, screen, mirrors)7.3%
  6. Tyres7.3%
  7. Emissions & leaks5.7%
  8. Seat belts & airbags1.5%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Rigid brake pipes: excessively corroded19.1%
  2. Tread depth below requirements of 1.6mm14.7%
  3. Brake discs: in such a condition that it is seriously weakened13.3%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure12.8%
  5. Brake pads: less than 1.5 mm thick7.5%

What this means if you are buying one

This model year fails more often than most cars its age, so budget for repairs and check the history carefully. Before buying, check the area that fails most: joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt. 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 2010 Mercedes-Benz B-Class?

In 2024, 58.3% of 2010 Mercedes-Benz B-Class cars passed their MOT first time, across 4,530 tests. The average for all 14-year-old cars was 59.6%.

What are the most common MOT failures on a 2010 Mercedes-Benz B-Class?

The most common failure reasons were joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt; side repeaters: not working; suspension arms - ball joint: ball joint excessively worn. The biggest problem area was lights & electrics.

Is the 2010 Mercedes-Benz B-Class reliable at MOT time?

Its MOT Rank score is 98, which is below average for a car of its age (100 means exactly average).