MERCEDES-BENZ B-CLASS MOT Pass Rate
75.6% of 23,301 MERCEDES-BENZ B-CLASS MOT tests pass.
The B-CLASS passes 75.6% of the time, noticeably below the figure for the average across all MERCEDES-BENZ models (82.8%).
At 75.6%, The MERCEDES-BENZ B-CLASS passes slightly less often than the national average for cars (78.3%).
Pass rate by vehicle age
Pass rate drops sharply with age: the MERCEDES-BENZ B-CLASS tested at 3–6 years pass 91.0% of the time, compared with just 64.0% at 15+ years.
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | no tests recorded | 0 | no reading |
| 3–6 years | 91.0% | 454 | 32,718 miles |
| 6–10 years | 85.0% | 7,314 | 56,017 miles |
| 10–15 years | 73.5% | 10,984 | 82,953 miles |
| 15+ years | 64.0% | 4,549 | 101,270 miles |
Common MOT failure reasons for the MERCEDES-BENZ B-CLASS
The most common reason the MERCEDES-BENZ B-CLASS fails its MOT is lamps, reflectors and electrical equipment — present in 44.5% of failed tests, most often logged as "not working".
| Category | Share of failed tests | Example |
|---|---|---|
| Lamps, reflectors and electrical equipment | 44.5% | not working |
| Suspension | 37.6% | ball joint dust cover no longer prevents the ingress of dirt |
| Brakes | 30.6% | excessively corroded |
| Tyres | 25.2% | has ply or cords exposed |
| Visibility | 14.2% | provides insufficient washer liquid |
| Body, chassis, structure | 12.4% | constant velocity boot split or insecure, no longer prevents the ingress of dirt |
| Noise, emissions and leaks | 10.0% | inoperative or indicates a malfunction |
| Seat belts and supplementary restraint systems | 4.4% | warning lamp indicates a fault |
| Road Wheels | 2.8% | fixing missing |
| Steering | 1.6% | ball joint has excessive play |
Related MERCEDES-BENZ models
- MERCEDES-BENZ C — 80.1% pass rate
- MERCEDES-BENZ A-CLASS — 81.3% pass rate
- MERCEDES-BENZ E — 82.3% pass rate
- MERCEDES-BENZ A — 91.3% pass rate
- MERCEDES-BENZ VITO — 75.4% pass rate
- MERCEDES-BENZ GLC — 90.2% pass rate