Mercedes-Benz B reliability
MOT pass rates & common faults · 13,325 real DVSA tests · 2024
Across 13,325 real DVSA MOT tests in 2024, 91% of Mercedes-Benz B cars aged 4 to 7 years pass their MOT first time — ahead of the 85% average for all cars of that age. It holds up especially well on steering and body & structure.
MOT pass rate by age
Where the B tends to fail
Share of Mercedes-Benz B cars aged 4 to 7 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, suspension.
Common questions
Is the Mercedes-Benz B reliable?
On 2024 MOT data the Mercedes-Benz B holds up well for its age: 91% of examples aged 4 to 7 years pass first time, against a 85% fleet average. That puts it ahead of 78% of similar-age models.
What is the MOT pass rate for a Mercedes-Benz B?
First-time MOT pass rates for the Mercedes-Benz B in 2024: up to 3 years, 93%; and 4 to 7 years, 91%. 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 MOT?
No single area stands out as a recurring weakness for the Mercedes-Benz B versus other cars of the same age — its MOT failures are spread across the usual wear items (tyres, brakes, lamps).