MERCEDES-BENZ 420 MOT Pass Rate
84.1% of 1,556 MERCEDES-BENZ 420 MOT tests pass.
The 420's pass rate of 84.1% is in line with the average across all MERCEDES-BENZ models, at 83.5%.
The MERCEDES-BENZ 420 has a pass rate of 84.1%, a little higher than the national average for cars (79.2%).
Pass rate by vehicle age
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | no tests recorded | 0 | no reading |
| 3–6 years | no tests recorded | 0 | no reading |
| 6–10 years | no tests recorded | 0 | no reading |
| 10–15 years | too few tests (2) | 2 | no reading |
| 15+ years | 84.0% | 1,554 | 102,325 miles |
Common MOT failure reasons for the MERCEDES-BENZ 420
The most common reason the MERCEDES-BENZ 420 fails its MOT is lamps, reflectors and electrical equipment — present in 72.4% of failed tests, most often logged as "Not working".
| Category | Share of failed tests | Example |
|---|---|---|
| Lamps, reflectors and electrical equipment | 72.4% | Not working |
| Brakes | 46.3% | Excessively binding |
| Suspension | 45.6% | Ball joint dust cover no longer prevents the ingress of dirt |
| Body, chassis, structure | 28.6% | Has a major leak of exhaust gases |
| Visibility | 26.5% | Does not clear the windscreen effectively |
| Noise, emissions and leaks | 17.3% | Emissions carbon monoxide content excessive |
| Tyres | 9.5% | Has a tear, caused by separation or partial failure of its structure |
| Steering | 9.5% | Ball joint dust cover excessively damaged or deteriorated so that it no longer prevents the ingress of dirt |
| Identification of the vehicle | 6.1% | Does not conform to the specified requirements |
| Road Wheels | 4.8% | More than one fixing missing |
Related MERCEDES-BENZ models
- MERCEDES-BENZ C-CLASS — 81.4% pass rate
- MERCEDES-BENZ A-CLASS — 85.3% pass rate
- MERCEDES-BENZ E-CLASS — 83.3% pass rate
- MERCEDES-BENZ GLA — 89.4% pass rate
- MERCEDES-BENZ GLC — 91.1% pass rate
- MERCEDES-BENZ CLA — 87.2% pass rate