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Mercedes-benz C - 2009

271.2 faults per 100 tests
Year average for all cars of 2009 is 311.0 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz C, model year 2009. Sample size: 14,779 cars, 33,508 tests and 90,888 recorded faults.
0%
Less faults compared to the average car of same model year

Quick summary

Total: 14,779 cars

The 2009 Mercedes-Benz C model has a defect rate of 271 per 100 vehicles, which is 12% lower than the average car of the same year, indicating a relatively positive performance overall. Notably, this model excels in categories such as Steering, Visibility, and Body/Structure, where it shows significantly fewer defects compared to the average, especially in Steering with a 75% lower defect rate. However, it does face challenges with brake issues, where the defect rate is considerably higher than average at 171 per 100 vehicles. Mileage trends show an increase in defect rates as mileage increases, particularly after 124,000 miles.

Cars by mileage segment

Total: 14,779 cars

Categories

Brakes
▼ 45.8% worse
171.3 faults / 100 tests
Year avg: 117.5 / 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
Steering
▲ 76.1% better
3.9 faults / 100 tests
Year avg: 16.3 / 100 tests
Visibility
▲ 27.8% better
16.9 faults / 100 tests
Year avg: 23.4 / 100 tests
Lights & Electrics
▲ 42.3% better
46.7 faults / 100 tests
Year avg: 80.9 / 100 tests
Wheels & Suspension
▲ 10.9% better
267.0 faults / 100 tests
Year avg: 299.8 / 100 tests
  • Tyre tread depth not in accordance with the requirements
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension pin, bush, joint or bearing: excessively worn
  • A suspension joint dust cover: severely deteriorated
  • A tyre: with a lump, bulge or tear … or with cords exposed or damaged
Body/Structure
▲ 75.4% better
10.2 faults / 100 tests
Year avg: 41.5 / 100 tests
Equipment
▲ 54.2% better
3.8 faults / 100 tests
Year avg: 8.3 / 100 tests
Other
▲ 33.7% better
22.8 faults / 100 tests
Year avg: 34.4 / 100 tests
  • Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users

Fault rate by mileage segment

Model    Year average
0 454 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)

Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 11,514
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 10,991
A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 8,823
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 4,944
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 3,371
A suspension joint dust cover: severely deteriorated
MINOR
Occurrences: 3,229
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 3,098
Brake lining or pad: worn below 1.5mm
ADVISORY
Occurrences: 2,909
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 2,491
A wheel bearing: with excessive play
ADVISORY
Occurrences: 2,287

Serious faults (Top 10)

A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 3,371
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 1,544
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 1,480
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 1,187
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 992
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 880
Parking brake efficiency: below minimum requirement
FAIL
Occurrences: 654
Lamp: missing, inoperative or in the case of a multiple light source more than a half not functioning
FAIL
Occurrences: 596
A headlamp: missing, inoperative or more than ½ not functioning in the case of LED
FAIL
Occurrences: 392
Brake lining or pad: worn below 1.5mm
FAIL
Occurrences: 391