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Mercedes-benz B-CLASS - 2012

173.0 faults per 100 tests
Year average for all cars of 2012 is 249.2 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz B-CLASS, model year 2012. Sample size: 6,189 cars, 14,173 tests and 24,514 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 6,189 cars

The 2012 Mercedes-Benz B-Class has an overall defect rate of approximately 173 per 100 vehicles, which is significantly lower than the average of 246 per 100, marking a 30% improvement. This model performs particularly well in several categories, including steering, where it has only 2 defects per 100 compared to the average of 13, and body/structure issues, which are also minimal at just 4 defects per 100 vehicles. Mileage-related trends show that as the vehicle age increases, the defect rate rises; however, the B-Class remains more reliable than many counterparts in its class. Overall, this model stands out for its reduced incidence of defects in crucial areas, indicating better reliability compared to the average vehicle of the same year.

Cars by mileage segment

Total: 6,189 cars

More model years for Mercedes-benz B-CLASS

2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

Other models from Mercedes-benz

Mercedes-benz 190 E Mercedes-benz 300 Mercedes-benz A Mercedes-benz A 180 AMG LINE Mercedes-benz A 180 SPORT Mercedes-benz A 200 Mercedes-benz A 250 AMG LINE Mercedes-benz A-CLASS Mercedes-benz B Mercedes-benz B-CLASS Mercedes-benz C Mercedes-benz CITAN Mercedes-benz CL Mercedes-benz CL 500 Mercedes-benz CLA Mercedes-benz CLC Mercedes-benz CLK Mercedes-benz CLS Mercedes-benz E Mercedes-benz E 220 AMG Mercedes-benz EQA 250 AMG LINE Mercedes-benz EQC 400 AMG LINE Mercedes-benz ESPRINTER Mercedes-benz EVITO Mercedes-benz G Mercedes-benz G-CLASS Mercedes-benz GL Mercedes-benz GLA Mercedes-benz GLA 180 AMG LINE Mercedes-benz GLA 200 AMG LINE Mercedes-benz GLA 250 AMG LINE Mercedes-benz GLA 250 EXCLUSIVE Mercedes-benz GLB 200 AMG LINE Mercedes-benz GLB 220 AMG LINE Mercedes-benz GLC Mercedes-benz GLC 300 AMG Mercedes-benz GLC 300 AMG LINE Mercedes-benz GLE Mercedes-benz GLS Mercedes-benz GT Mercedes-benz ML Mercedes-benz R-Class Mercedes-benz S-Class Mercedes-benz SL Mercedes-benz SLC Mercedes-benz SLK Mercedes-benz SPRINTER Mercedes-benz V Mercedes-benz VIANO Mercedes-benz VITO Mercedes-benz X

Categories

Brakes
▼ 8.0% worse
112.1 faults / 100 tests
Year avg: 103.8 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 84.1% better
2.1 faults / 100 tests
Year avg: 13.2 / 100 tests
Visibility
▲ 29.2% better
13.6 faults / 100 tests
Year avg: 19.2 / 100 tests
Lights & Electrics
▲ 56.5% better
26.9 faults / 100 tests
Year avg: 61.9 / 100 tests
Wheels & Suspension
▲ 28.8% better
173.9 faults / 100 tests
Year avg: 244.4 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A suspension joint dust cover: severely deteriorated
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
Body/Structure
▲ 85.1% better
3.9 faults / 100 tests
Year avg: 26.2 / 100 tests
Equipment
▲ 37.1% better
3.9 faults / 100 tests
Year avg: 6.2 / 100 tests
Other
▲ 60.2% better
9.4 faults / 100 tests
Year avg: 23.6 / 100 tests

Fault rate by mileage segment

Model    Year average
0 402 0–31,000 mi 31,000–62,000 62,000–93,000 93,000–124,000 124,000+
* Metric: faults per 100 tests.

Most common faults (Top 10)

Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 3,655
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 2,686
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,790
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,711
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,138
A suspension joint dust cover: severely deteriorated
MINOR
Occurrences: 1,062
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 1,016
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 970
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 863
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 763

Serious faults (Top 10)

A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 863
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 521
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 441
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 399
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 368
A rear registration plate lamp or light source missing or inoperative: when rear registration plate has only one lamp or all lamps not working
FAIL
Occurrences: 333
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 207
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 203
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 190
Any fracture or welding defect on a wheel
FAIL
Occurrences: 159