Mercedes-Benz B-Class reliability
MOT pass rates & common faults · 95,372 real DVSA tests · 2024
Across 95,372 real DVSA MOT tests in 2024, 77% of Mercedes-Benz B-Class cars aged 8 to 12 years pass their MOT first time — in line with the 73% average for cars of that age. It holds up especially well on steering and body & structure.
MOT pass rate by age
Where the B-Class tends to fail
Share of Mercedes-Benz B-Class cars aged 8 to 12 years with no fault in each area (higher is better). The tick is the fleet average for the same age.
Holds up better than average on steering, body & structure, brakes.
Common questions
Is the Mercedes-Benz B-Class reliable?
On 2024 MOT data the Mercedes-Benz B-Class is about average for its age: 77% of examples aged 8 to 12 years pass first time, against a 73% fleet average. That puts it ahead of 50% of similar-age models.
What is the MOT pass rate for a Mercedes-Benz B-Class?
First-time MOT pass rates for the Mercedes-Benz B-Class in 2024: 4 to 7 years, 86%; 8 to 12 years, 77%; and 13 years and older, 57%. Pass rates fall with age across the whole fleet, so compare each figure with cars of the same age, not with a new car.
What commonly fails on a Mercedes-Benz B-Class MOT?
For Mercedes-Benz B-Class cars aged 13 years and older, the areas that fail an MOT more often than the fleet average are brakes (9.7% of tests vs 7.4% fleet), body & structure (6.4% of tests vs 4.7% fleet), visibility (5.6% of tests vs 4.3% fleet).