MOT performance
2004 Mercedes-Benz C-Class: MOT pass rate and common failures
Of 15,051 MOT tests on 2004-registered Mercedes-Benz C-Classs in 2023–2024 (on average 18.9 years old at test, median 112,310 miles), 56.9% passed first time, 17.6 points lower than the Mercedes-Benz C-Class overall. Allowing for age, mileage and fuel, 2004 Mercedes-Benz C-Classs failed about as often as comparable cars.
15,051 MOT tests on 8,287 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 56.9% | ±0.8 pts (95%), n = 15,051 |
| All Mercedes-Benz C-Classs | 74.5% | n = 766,949 |
| Failures vs similar cars | 0.96× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 10.7% | n = 15,051 |
| Average age at test | 18.9 years | n = 15,051 |
Where 2004 Mercedes-Benz C-Classs fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Suspension | 21.9% | +24% |
| Lights, reflectors and electrical | 17.4% | -23% |
| Brakes | 11.3% | -21% |
| Noise, emissions and leaks | 9.8% | +22% |
| Tyres | 7.7% | +11% |
| Driver's view of the road | 5.9% | -24% |
| Steering | 5.1% | +12% |
| Body, chassis and structure | 3.6% | -62% |
| Seat belts and airbags | 2.5% | -19% |
| Road wheels | 1.1% | +119% |
| Registration plates and VIN | 0.7% | -7% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Ball joint: ball joint excessively worn | Suspension | 8.92% |
| Coil spring: fractured or broken | Suspension | 6.75% |
| Malfunction indicator lamp: inoperative or indicates a malfunction | Noise, emissions and leaks | 5.06% |
| Headlamp aim: projected beam image is obviously incorrect | Lights, reflectors and electrical | 4.07% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 3.59% |
Check a specific 2004 Mercedes-Benz C-Class
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About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.