2011 · 13 years old at test · Petrol mostly

2011 Mercedes-Benz B-Class MOT pass rate and common faults

3,556 MOT tests in 2024. 58.9% passed first time, compared with 61.8% for all cars the same age.

95Below average
Passed first time58.9%
Failed or needed repairs41.1%
Typical mileage at test81,000

Most common reasons for failing

Share of all 3,556 tests where this item caused a failure.

  1. Side repeaters: not working6.1%
  2. Suspension arms - ball joint: ball joint excessively worn4.7%
  3. Coil spring: fractured or broken4.1%
  4. Malfunction indicator lamp: inoperative or indicates a malfunction4.0%
  5. Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt3.4%
  6. Service brake performance: efficiency below requirements3.3%
  7. Rigid brake pipes: excessively corroded3.3%
  8. Shock absorbers: has a serious fluid leak2.7%
  9. Joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt2.6%
  10. Individual direction indicators: incorrect colour2.4%

Problem areas

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

  1. Lights & electrics25.9%
  2. Suspension18.8%
  3. Brakes18.2%
  4. Tyres9.3%
  5. Visibility (wipers, screen, mirrors)6.6%
  6. Emissions & leaks6.4%
  7. Body & chassis5.1%
  8. Seat belts & airbags1.7%

Most common advisories

Not failures yet, but things the tester warned about.

  1. Rigid brake pipes: excessively corroded18.6%
  2. Tread depth below requirements of 1.6mm14.0%
  3. Brake discs: in such a condition that it is seriously weakened12.5%
  4. Tyres - condition: has a tear, caused by separation or partial failure of its structure11.3%
  5. Brake pads: less than 1.5 mm thick7.1%

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: side repeaters: not working. 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 2011 Mercedes-Benz B-Class?

In 2024, 58.9% of 2011 Mercedes-Benz B-Class cars passed their MOT first time, across 3,556 tests. The average for all 13-year-old cars was 61.8%.

What are the most common MOT failures on a 2011 Mercedes-Benz B-Class?

The most common failure reasons were side repeaters: not working; suspension arms - ball joint: ball joint excessively worn; coil spring: fractured or broken. The biggest problem area was lights & electrics.

Is the 2011 Mercedes-Benz B-Class reliable at MOT time?

Its MOT Rank score is 95, which is below average for a car of its age (100 means exactly average).