2009 Mercedes-Benz B-Class · 15,659 MOT tests
2009 Mercedes-Benz B-Class reliability
2009 Mercedes-Benz B-Classs fail 40.9% of first MOT tests, 3% more MOT fails than the average car its age and mileage, ranking 12 of 16 B-Class years (15,659 DVSA tests, 2022 to 2024).
Looking at a 2009 Mercedes-Benz B-Class?
See its own MOT history and mileage, free.
- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- 40.9%
- first-time fail rate (all Mercedes-Benz B-Classs: 26.5%)
- fails than cars of the same age and mileage
- 3% more
- fails than cars of the same age and mileage
- typical miles at its MOT, aged about 14
- 89,144
- typical miles at its MOT, aged about 14
- MOT tests, 2022 to 2024
- 15,659
- MOT tests, 2022 to 2024
Year on year
2009 against the years either side
- 2008 cars: 5% more MOT fails than the average car its age (the 2009 car does better)
- 2010 cars: 6% more MOT fails than the average car its age (the 2009 car does better)
- Weak spot: brakes, 13.2% of tests fail here (35% above cars of the same age and mileage).
- Strong point: tyres, 10% fewer fails than comparable cars.
- Plates: a 2009 car carries a 58 plate (January–February 2009), or a 09 plate (March–August 2009), or a 59 plate (September–December 2009).
Common problems
What fails on a 2009 Mercedes-Benz B-Class
Fail rate by area
- Lights and electrics16.9%
- Suspension15.5%
- Brakes13.2%
- Body, chassis and structure7.9%
- Tyres6.5%
- Windscreen, wipers and mirrors6.5%
- Exhaust, emissions and leaks5%
Average for cars of the same age and mileage
Top failures
Coil spring fractured or broken 5.46%
A broken coil spring can leave the car sitting low or unstable, so it must be replaced before driving.
CV joint boot split or insecure 4.67%
A split CV boot lets dirt in and grease out, so the joint wears and may need full replacement.
Suspension ball joint excessively worn 3.9%
A worn ball joint can fail and cause loss of steering control, so it must be replaced promptly.
Rigid brake pipe excessively corroded 3.55%
Badly corroded brake pipes can leak or fail, which can cause a loss of braking, so repair is urgent.
Dipped beam headlamp not working 2.59%
A failed dipped beam makes it hard to see and be seen at night, so the lamp needs fixing before driving.
Parking brake efficiency below minimum 2.57%
The parking brake holds the car less well than required, so it may roll on a slope and needs repair.
Common advisories
Brake pipes corroded and greasy (19.15%) · Tyre worn close to legal limit (13.48%) · Brake disc pitted or scored (11.72%) · Tyre slightly damaged or cracking (9.4%) · Brake pads wearing thin (6.9%) · Slight play in steering rack joints (4.5%)
Other years
Every Mercedes-Benz B-Class year
The full picture: Mercedes-Benz B-Class reliability. Before you pay for any Mercedes-Benz B-Class, a Full Check (£9.99) shows finance, stolen and write-off records the MOT can't.
Source: DVSA anonymised MOT results, 2022 to 2024, class 4 normal tests.
Is a 2009 Mercedes-Benz B-Class reliable?
2009 Mercedes-Benz B-Classs fail 40.9% of first MOT tests, 3% more MOT fails than the average car its age and mileage, ranking 12 of 16 B-Class years (15,659 DVSA tests, 2022 to 2024).
What fails on a 2009 Mercedes-Benz B-Class MOT?
Most often coil spring fractured or broken (5.46% of tests), cv joint boot split or insecure (4.67% of tests), suspension ball joint excessively worn (3.9% of tests).
How many miles should a 2009 Mercedes-Benz B-Class have done?
At its MOT aged about 14, a typical 2009 Mercedes-Benz B-Class shows 89,144 miles. Much higher or lower is worth asking about.
What plate is a 2009 car?
A car first registered in 2009 carries a 58 plate (January–February 2009), or a 09 plate (March–August 2009), or a 59 plate (September–December 2009).
Check a 2009 Mercedes-Benz B-Class free
MOT history, mileage record, ULEZ, tax and recalls on any UK car, in seconds. No sign-up, no card.