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Mercedes-benz B-CLASS - 2015

120.8 faults per 100 tests
Year average for all cars of 2015 is 174.5 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 2015. Sample size: 5,940 cars, 12,871 tests and 15,542 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 5,940 cars

The 2015 Mercedes-Benz B-Class has a significantly lower overall defect rate of 121 per 100 vehicles compared to the average of 170 per 100, marking a 29% improvement. This model shows a noticeable increase in defects with mileage, particularly in the higher mileages, but performs better than average in several key areas. Notably, defects in brakes and steering are markedly lower, with brake issues at 64% versus the average of 84%, and steering defects at just 0.5% compared to 9.2%. Additionally, visibility and body structure defects are also less frequent, indicating that this model holds up well in these categories relative to its peers. Overall, the B-Class stands out positively in terms of reliability for its age, especially in critical safety features.

Cars by mileage segment

Total: 5,940 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
▲ 24.0% better
64.4 faults / 100 tests
Year avg: 84.7 / 100 tests
  • Brake lining or pad: worn below 1.5mm
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
  • Brake disc or drum: significantly and obviously worn
Steering
▲ 94.9% better
0.5 faults / 100 tests
Year avg: 9.9 / 100 tests
Visibility
▲ 24.8% better
12.1 faults / 100 tests
Year avg: 16.1 / 100 tests
Lights & Electrics
▲ 34.8% better
20.2 faults / 100 tests
Year avg: 31.0 / 100 tests
  • A rear registration plate lamp or light source missing or inoperative: when rear registration plate has only one lamp or all lamps not working
Wheels & Suspension
▲ 24.6% better
134.5 faults / 100 tests
Year avg: 178.3 / 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 tyre: with a lump, bulge or tear … or with cords exposed or damaged
  • A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
Body/Structure
▲ 90.6% better
1.1 faults / 100 tests
Year avg: 11.7 / 100 tests
Equipment
▲ 27.5% better
2.9 faults / 100 tests
Year avg: 4.0 / 100 tests
Other
▲ 56.1% better
5.8 faults / 100 tests
Year avg: 13.2 / 100 tests

Fault rate by mileage segment

Model    Year average
0 342 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: 2,924
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 2,019
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 1,260
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,185
Brake disc or drum: significantly and obviously worn
ADVISORY
Occurrences: 739
A suspension joint dust cover: severely deteriorated
MINOR
Occurrences: 642
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 448
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
ADVISORY
Occurrences: 409
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 400
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: 364

Serious faults (Top 10)

A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 448
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 400
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: 364
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 342
A tyre: with a cut in excess of the requirements deep enough to reach the ply or cords
FAIL
Occurrences: 209
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 190
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 171
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 112
Windscreen washers not working or not providing sufficient fluid to clear the windscreen
FAIL
Occurrences: 111
An SRS malfunction indicator lamp (MIL) indicates a system malfunction
FAIL
Occurrences: 88