RegVerdict Model Intelligence
Mercedes-Benz B reliability
MOT pass rates & common faults·13,325 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.
91%
Strong for its agepass first time (4 to 7 years)
Strong for its age · beats 78% of peers
+6 pts
MOT pass rate by age
Up to 3 years
2,428 tests · fleet 89%
93%
4 to 7 years
10,897 tests · fleet 85%
91%
Where the B fails
Suspension100
Brakes99
Body & structure100
Steering100
Tyres97
Lights & electrics99
Holds up better on steering, body & structure, suspension.
Share of 4 to 7 years Mercedes-Benz B MOTs with no fault in each area; the marker shows the fleet average. OGL v3.0.
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).
Other Mercedes-Benz models
Check a Mercedes-Benz B’s full history