Does the Mercedes-Benz B fail the MOT on lamps, reflectors and electrics more than it should?
The Mercedes-Benz B records 6.08 lamps, reflectors and electrics failure items per 100 initial MOT tests (2019–2024), against 5.66 expected for a car of the same age mix: about as expected for its class and age (the difference is within its interval or under 0.5 items per 100 tests) (+0.42, 95% interval −0.29 to +1.14). It ranks 268 of 729 models on lamps, reflectors and electrics (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on lamps, reflectors and electrics · check a Mercedes-Benz B by registration
What exactly fails on lamps, reflectors and electrics?
The most frequent DVSA defect wording in this group on the Mercedes-Benz B is “A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps”, recorded 90 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps | 90 | 1.96 |
| The aim of a headlamp is not within limits laid down in the requirements | 38 | 0.83 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 4,602 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
Mercedes-Benz B 2014 · Mercedes-Benz B 2019 · Mercedes-Benz B by postcode area · Mercedes-Benz B body, chassis and structure failures · Mercedes-Benz B brakes failures · Mercedes-Benz B noise, emissions and leaks failures · Mercedes-Benz B seat belts and airbags failures · Mercedes-Benz B suspension failures · Mercedes-Benz B tyres failures · Mercedes-Benz B visibility failures