Mercedes-Benz Clk-Class MOT pass rate and common failures
In 2025, 63.1% of Mercedes-Benz Clk-Class MOT tests were a first-time pass, across 25,048 tests in Great Britain. For all cars it was 71.5%.
Compared with cars of the same age
Older cars fail more often, so a model that’s mostly a few years old will look better than one that’s mostly 12. These figures compare like with like.
At 3–5 years
–
Too few tests at this age to say.
At 6–10 years
–
Too few tests at this age to say.
At 11 years and over
63.2%
All cars: 61.3% (1.9 points better). 24,981 tests.
Pass rate by age
Figures by age, with typical mileage
| Age (years) | Tests | First-time pass | All cars | Typical mileage |
|---|---|---|---|---|
| 15 | 1,092 | 58.4% | 58.6% | 96,250 miles |
| 16 | 2,953 | 61.3% | 57.5% | 98,750 miles |
| 17 | 3,021 | 60.2% | 57.2% | 103,750 miles |
| 18 | 3,079 | 61.6% | 57.0% | 103,750 miles |
| 19 | 3,213 | 62.6% | 57.2% | 106,250 miles |
| 20+ | 11,623 | 65.4% | 61.4% | 101,250 miles |
Typical mileage is the median reading at the test, to the nearest 2,500 miles.
What fails most often
The share of Mercedes-Benz Clk-Class MOT tests that failed on at least one item in each area, against all cars. A test can fail on several areas at once.
| Area | Clk-Class | All cars |
|---|---|---|
| Suspension | 29.6% | 13.7% |
| Lamps, reflectors and electrical equipment | 22.8% | 16.6% |
| Brakes | 16.4% | 10.2% |
| Tyres | 9.9% | 8.4% |
| Noise, emissions and leaks | 6.4% | 4.0% |
| Visibility | 6.4% | 5.2% |
| Steering | 3.4% | 2.5% |
| Body, chassis, structure | 3.1% | 4.2% |
Most common reasons for failing
- Ball joint excessively worn failed 8.3% of tests · what this means
- Coil spring: fractured or broken failed 7.0% of tests · what this means
- Headlamp aim: projected beam image is obviously incorrect failed 5.2% of tests · what this means
- Pins and bushes: pin or bush excessively worn failed 4.2% of tests · what this means
- Tread depth below requirements of 1.6mm failed 3.3% of tests
- Rigid brake pipes: excessively corroded failed 3.1% of tests · what this means
- Malfunction indicator lamp: inoperative or indicates a malfunction failed 2.9% of tests · what this means
- Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt failed 2.8% of tests · what this means
- Position lamp: not working failed 2.7% of tests · what this means
- Wipers: does not clear the windscreen effectively failed 2.3% of tests · what this means
Checking a particular Clk-Class?
See its own MOT history, mileage record and advisories in plain English. Free, no sign-up.
About these figures
- They cover every Clk-Class version DVSA records under this name (engines, trims and generations together), on its first MOT test of each visit. A “pass with rectification” (fixed within an hour) counts as a fail, as in DVSA’s own statistics.
- Cars under three years old are left out, because the few tested that young are mostly taxis.
- Fuel mix of the cars tested: petrol 81.5%, diesel 18.4%, liquefied petrolum gas (lpg) 0.1%.
- A pass rate describes the model, not any one car. How a car has been looked after matters more.
Download these figures (CSV) · Other Mercedes-Benz models · All makes
Source: DVSA anonymised MOT test data for 2025. Contains public sector information licensed under the Open Government Licence v3.0. Our own analysis; not produced or endorsed by DVSA.