Mercedes-Benz C-Class 2004
Cars aged 21 · Data updated: 2026-11-09 (week 46) · source: VDA / Transeksta, CC BY 4.0
Pass the inspection first time
43.4% ±1.5 pp
M1 average at 21 years – 38.5%
n = 4,070 inspections
Expected mileage now (median)
322,480 km
Percentiles · cars aged 21
p10 238k
p25 272k
p50 322k
p75 376k
p90 413k
| km | |
|---|---|
| p10 | 237,517 km |
| p25 | 272,376 km |
| p50 | 322,480 km |
| p75 | 376,386 km |
| p90 | 413,044 km |
Inspection verdicts
C-Class 2004, n = 4,070
| % | |
|---|---|
| No defects | 17.7% |
| Minor defects | 25.7% |
| Major defects | 55.1% |
| Dangerous defects | 1.5% |
Odometer inconsistencies
1.8%
cars whose reading dropped between inspections
CO (petrol, idle)
0.10%
13.6% over the limit · n = 574
Smoke opacity (diesel)
0.65 m⁻¹
23.8% over the limit · n = 3,313
What these numbers say
43.4% of 2004 Mercedes-Benz C-Class cars pass the technical inspection at the first attempt (n = 4,070), against an average of 38.5% for all 21-year-old M1 cars.
At 21 years old, a typical one now shows 322,480 km on the odometer; half of them read between 272,376 km and 376,386 km.
An odometer inconsistency was recorded for 20 cars, 1.8% of those assessed.
The median diesel smoke opacity is 0.65 m⁻¹; 23.8% of measurements exceed the limit.
Figures are not adjusted for how intensively cars are used. How we calculate