RegVerdict Model Intelligence
Mercedes-Benz B-Class reliability
MOT pass rates & common faults·95,372 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.
77%
Average for its agepass first time (8 to 12 years)
Average for its age · beats 50% of peers
In line
MOT pass rate by age
4 to 7 years
15,463 tests · fleet 85%
86%
8 to 12 years
49,155 tests · fleet 73%
77%
13 years and older
30,754 tests · fleet 61%
57%
Where the B-Class fails
Suspension95
Brakes98
Body & structure100
Steering100
Tyres95
Lights & electrics94
Holds up better on steering, body & structure, brakes.
Share of 8 to 12 years Mercedes-Benz B-Class MOTs with no fault in each area; the marker shows the fleet average. OGL v3.0.
How it tends to age
How the Mercedes-Benz B-Class tends to age
The MOT areas flagged most often on Mercedes-Benz B-Class models 13 years and older. It is the model’s typical pattern across millions of tests, not a forecast for this specific car.
- Lights & electrics · flagged on ~13% of MOTsGrows with age
- Suspension · flagged on ~11% of MOTsGrows with age
- Brakes · flagged on ~10% of MOTsAbove average
- Body & structure · flagged on ~6% of MOTsGrows with age
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).
Other Mercedes-Benz models
Check a Mercedes-Benz B-Class’s full history