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Mercedes-benz C - 2004

402.7 faults per 100 tests
Year average for all cars of 2004 is 384.6 faults per 100 tests
Dataset: MOT tests in Great Britain (period: 2024-01-01 to 2025-09-10) for Mercedes-benz C, model year 2004. Sample size: 6,856 cars, 14,915 tests and 60,064 recorded faults.
0%
More faults compared to the average car of same model year

Quick summary

Total: 6,856 cars

The 2004 Mercedes-Benz C model exhibits a slightly higher overall defect rate of 403 defects per 100 vehicles, compared to the yearly average of 382 defects. Notably, this model shows significant strengths in steering, body/structure, and equipment categories, performing better than average by 22%, 43%, and 31% respectively. However, it has a notable issue with wheels, suspensions, and axles, recording a defect rate that is 23% worse than the average. Mileage trends indicate that defect rates increase with higher mileage, particularly in the 124,000+ miles category, where the model has a defect rate of 556 per 100 vehicles. Overall, while the Mercedes-Benz C model performs better in some critical areas, it faces challenges related to suspension and axle issues.

Cars by mileage segment

Total: 6,856 cars

Categories

Brakes
▼ 12.1% worse
184.1 faults / 100 tests
Year avg: 164.2 / 100 tests
  • Brake pipe damaged or excessively corroded
  • Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
  • Brake disc or drum: insecure, fractured or otherwise likely to fail
Steering
▲ 21.7% better
19.5 faults / 100 tests
Year avg: 24.9 / 100 tests
Visibility
▲ 10.6% better
26.2 faults / 100 tests
Year avg: 29.3 / 100 tests
Lights & Electrics
▲ 6.0% better
103.3 faults / 100 tests
Year avg: 109.9 / 100 tests
Wheels & Suspension
▼ 21.3% worse
379.6 faults / 100 tests
Year avg: 312.9 / 100 tests
  • A suspension pin, bush, joint or bearing: excessively worn
  • Tyre tread depth not in accordance with the requirements
  • A suspension component: excessively damaged or corroded
  • A spring: or spring component fractured or seriously weakened
  • A suspension pin, bush, joint or bearing: excessively worn
Body/Structure
▲ 45.1% better
34.9 faults / 100 tests
Year avg: 63.6 / 100 tests
Equipment
▲ 34.8% better
9.0 faults / 100 tests
Year avg: 13.8 / 100 tests
Other
▲ 3.6% better
48.7 faults / 100 tests
Year avg: 50.5 / 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
0 556 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)

A suspension pin, bush, joint or bearing: excessively worn
ADVISORY
Occurrences: 5,157
Brake pipe damaged or excessively corroded
ADVISORY
Occurrences: 4,627
Tyre tread depth not in accordance with the requirements
ADVISORY
Occurrences: 4,399
A suspension component: excessively damaged or corroded
ADVISORY
Occurrences: 4,237
A spring: or spring component fractured or seriously weakened
ADVISORY
Occurrences: 3,149
A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 2,176
Fluid: leaking excessively and likely to harm the environment or to pose a safety risk to other road users
ADVISORY
Occurrences: 1,921
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
ADVISORY
Occurrences: 1,891
Flexible brake hose: excessively damaged, deteriorated, chafed, twisted or stretched
ADVISORY
Occurrences: 1,886
Brake disc or drum: insecure, fractured or otherwise likely to fail
ADVISORY
Occurrences: 1,838

Serious faults (Top 10)

A suspension pin, bush, joint or bearing: excessively worn
FAIL
Occurrences: 2,176
A spring: or spring component fractured or seriously weakened
FAIL
Occurrences: 750
A suspension joint dust cover: missing or no longer prevents the ingress of dirt etc.
FAIL
Occurrences: 698
Beam image obviously incorrect
FAIL
Occurrences: 582
Tyre tread depth not in accordance with the requirements
FAIL
Occurrences: 465
Engine MIL inoperative or indicating a malfunction
FAIL
Occurrences: 451
A steering ball joint: with excessive wear or free play
FAIL
Occurrences: 428
A tyre: with a lump, bulge or tear … or with cords exposed or damaged
FAIL
Occurrences: 363
Brake pipe damaged or excessively corroded
FAIL
Occurrences: 357
Exhaust system has a major leak or is insecure
FAIL
Occurrences: 275