2010 Mercedes-Benz B-Class MOT pass rate, common failures & what to check
In 2025, 58.2% of Mercedes-Benz B-Class cars first used in 2010 passed their MOT first time, against 59.3% for all cars first used in 2010. Across 13,873 B-Class first tests from 2023 to 2025, the most common failure areas were lamps and electrical equipment, suspension and brakes.
This page analyses first MOT tests for Mercedes-Benz B-Class cars first used in 2010 (all trims grouped): 2021 to 2025 for the pass-rate trend, and 2023 to 2025 for the failure and advisory analysis — plus what is worth checking before you buy one.
Data: DVSA anonymised MOT tests to December 2025 · Calculated by SortedCars · Updated October 2026
How the 2010 Mercedes-Benz B-Class MOT pass rate has changed
Share of first tests passed in each year, B-Class cars first used in 2010 against all cars first used in 2010 (any make or fuel; not adjusted for mileage, fuel or use). In 2025 the B-Class figure was in line with the all-cars figure.
View this chart as a table
| Test year | 2010 B-Class | All cars first used 2010 | B-Class first tests |
|---|---|---|---|
| 2021 | 64.7% | 62.6% | 5,107 |
| 2022 | 62.6% | 61.7% | 5,070 |
| 2023 | 60.4% | 60.5% | 4,891 |
| 2024 | 58.1% | 59.6% | 4,645 |
| 2025 | 58.2% | 59.3% | 4,337 |
Common 2010 Mercedes-Benz B-Class MOT failures
Share of the 5,694 failed first tests (2023–2025) with at least one failure in each area. A test can fail in more than one area, so the shares add up to more than 100%.
Most common failure items
| DVSA failure item | Share of failed first tests | Tests |
|---|---|---|
| Side repeaters: not working | 12.9% | 732 |
| Drive shaft joints: constant velocity boot split or insecure, no longer prevents the ingress of dirt | 11.8% | 670 |
| Coil spring: fractured or broken | 11.0% | 624 |
| Ball joint: excessively worn | 10.5% | 596 |
| Rigid brake pipes: excessively corroded | 9.3% | 528 |
Item names are DVSA’s own wording. 2023–2025 combined.
Enter the car's registration to run the check.
Free · opens our free car check — no sign-in needed.
Typical repair costs for common MOT failures
Typical UK garage prices for the job, not for a B-Class in particular, and not a quote.
| Failure item | Typical job | Typical UK price | Usual range |
|---|---|---|---|
| Coil spring: fractured or broken | Coil spring replacement | £248 | £175–£400 |
| Ball joint: excessively worn | Ball joint replacement | £90 | £60–£150 |
From published UK repair-cost guides, checked September 2026. Only jobs with a published typical price are shown.
What to check on a 2010 Mercedes-Benz B-Class before buying
The three areas where failed first tests most often had a fault, 2023–2025.
- Lamps and electrics. Ask someone to watch while you work the brake lights, indicators, sidelights, dipped and main beam, and the number-plate lamps.
- Suspension. Worth looking behind the front wheels with a torch at the coil springs, and listening for knocks over bumps on the test drive.
- Brakes. Worth looking at the discs and pads through the wheel spokes for scoring and a worn lip, and noticing on the test drive whether the car pulls to one side or the pedal feels long.
Common 2010 Mercedes-Benz B-Class MOT advisories
Advisories are points the tester noted that did not fail the car. Most common on 2010 B-Class cars, as a share of all 13,873 first tests, 2023–2025.
| DVSA advisory item | Share of first tests | Tests |
|---|---|---|
| Rigid brake pipes: corroded, covered in grease or other material | 19.1% | 2,647 |
| Tread depth: worn close to legal limit/worn on edge | 14.5% | 2,018 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 12.9% | 1,793 |
| Tyre condition: slightly damaged/cracking or perishing | 12.0% | 1,665 |
| Brake pads: wearing thin | 7.3% | 1,006 |
Questions about the 2010 Mercedes-Benz B-Class MOT
What is the MOT pass rate of a 2010 Mercedes-Benz B-Class?
In 2025, 58.2% of B-Class cars first used in 2010 passed their MOT first time, against 59.3% for all cars first used in 2010. A car fixed during the test counts as a fail.
What does a 2010 B-Class most often fail its MOT on?
Lamps and electrical equipment (in 46.9% of failed first tests, 2023–2025), suspension (36.6%) and brakes (29.8%). The single most common item was “Side repeaters: not working” (12.9%).
How often does a 2010 Mercedes-Benz B-Class fail its MOT?
In 2025, 41.8% of first tests on B-Class cars first used in 2010 did not pass first time: 34.3% failed, and a further 7.5% had a fault fixed during the test (counted as a fail here). Across 2023–2025, 5,694 of 13,873 first tests did not pass first time.
What are the most common 2010 Mercedes-Benz B-Class MOT advisories?
“Rigid brake pipes: corroded, covered in grease or other material” (on 19.1% of first tests, 2023–2025), “Tread depth: worn close to legal limit/worn on edge” (14.5%), “Brake discs: worn, pitted or scored, but not seriously weakened” (12.9%), “Tyre condition: slightly damaged/cracking or perishing” (12.0%) and “Brake pads: wearing thin” (7.3%).
Is a 2010 Mercedes-Benz B-Class reliable?
An MOT pass rate shows what failed at the test, not how reliable a car is. For this group of cars the first-time pass rate went from 64.7% in 2021 to 58.2% in 2025. For one particular car, its own MOT history matters more than the average.
Other cars first used in 2010
The most-tested cars from the same year. Each page uses the same method.
2010 Ford Fiesta MOT statistics · 2010 Ford Focus MOT statistics · 2010 Vauxhall Corsa MOT statistics · 2010 Vauxhall Astra MOT statistics · 2010 Volkswagen Golf MOT statistics
Checking a specific 2010 B-Class?
The numbers above cover every B-Class first used in 2010 and tested in Great Britain. Our free check shows the actual MOT history, mileage record and tax status of the one you are looking at.
Enter the car's registration to run the check.
Free · no sign-in needed.