MOT performance
2012 Mercedes-Benz B-Class: MOT pass rate and common failures
Of 11,852 MOT tests on 2012-registered Mercedes-Benz B-Classs in 2023–2024 (on average 10.9 years old at test, median 78,052 miles), 70.6% passed first time, 2.4 points lower than the Mercedes-Benz B-Class overall. Allowing for age, mileage and fuel, 2012 Mercedes-Benz B-Classs failed 12% less often than comparable cars.
11,852 MOT tests on 6,006 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
Check a specific car's MOT history and running costsAt a glance
| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 70.6% | ±0.8 pts (95%), n = 11,852 |
| All Mercedes-Benz B-Classs | 73.0% | n = 145,990 |
| Failures vs similar cars | 0.88× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 9.0% | n = 11,852 |
| Average age at test | 10.9 years | n = 11,852 |
Where 2012 Mercedes-Benz B-Classs fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Suspension | 11.3% | -5% |
| Lights, reflectors and electrical | 9.8% | -26% |
| Tyres | 7.2% | +4% |
| Brakes | 6.0% | -21% |
| Noise, emissions and leaks | 3.2% | +11% |
| Driver's view of the road | 3.0% | -36% |
| Seat belts and airbags | 1.8% | +100% |
| Road wheels | 1.7% | +274% |
| Body, chassis and structure | 1.2% | -69% |
| Steering | 0.4% | -86% |
| Registration plates and VIN | 0.2% | -31% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt | Suspension | 4.06% |
| Coil spring: fractured or broken | Suspension | 3.60% |
| Registration plate lamp(s): inoperative in the case of a single lamp or all lamps | Lights, reflectors and electrical | 2.81% |
| Ball joint: ball joint excessively worn | Suspension | 2.19% |
| Condition: has ply or cords exposed | Tyres | 2.13% |
Check a specific 2012 Mercedes-Benz B-Class
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
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.