Mercedes-Benz B 2019: MOT failure rate for its age
6.0% of 232 MOT tests of the Mercedes-Benz B first registered in 2019 failed at the first attempt (2019–2024; retests excluded). Against this model's own normal rate at the same ages the index is 41.3 (95% CI 19.7–63.0; 100 = normal for this model at that age): the 2019 Mercedes-Benz B fails less often than other build years of the same model at the same age. This is a rough estimate from a smaller sample.
| Measure | Value | Unit | Compared with | Years | Tests |
|---|---|---|---|---|---|
| Failed first time | 6.0 | % | all ages tested | 2019–2024 | 232 |
| Index against this model at the same age (95% CI 19.7–63.0) | 41.3 | index | 100 = normal for this model at that age | 2019–2024 | 232 |
| Rank among this model's 2 build years | 1 | of 2 | 1 = fails least for its age | 2019–2024 | 232 |
| Tested in 2024 | 117 | tests | median 27,045 miles | 2024 | 117 |
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · full dataset (v5).
How does the 2019 Mercedes-Benz B fail at each age?
Cars built in 2019 were tested at ages 3 to 5 between 2019 and 2024. Each row compares their first-time failure share with what this model normally shows at that age, after allowing for the overall failure level of each test year.
| Age | Tests | Failed, % | 95% interval | Normal for this model at that age, % | Index (100 = normal) |
|---|---|---|---|---|---|
| 3 | 115 (rough estimate) | 4.3 | 1.9–9.8 | 9.9 | 43.8 |
| 4 | 116 (rough estimate) | 7.8 | 4.1–14.1 | not available | not available |
| 5 | 117 (rough estimate) | 7.7 | 4.1–14 | 19.2 | 40.1 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 348 (initial tests) · Method: normal rate = this model's first-time failure share at that age across its build years (cells of 400+ tests), adjusted for each test year's overall level; cells of 30+ tests, under 500 marked rough · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
How does 2019 compare with the years around it?
Among the 2 published build years of the Mercedes-Benz B, 2019 ranks 1 (1 = fails least for its age). 2014: index 95.3.
| Build year | Index (100 = normal) | 95% interval | Verdict | Tests |
|---|---|---|---|---|
| 2014 | 95.3 | 86.0–104.6 | no different (rough estimate) | 2,041 |
| 2019 | 41.3 | 19.7–63.0 | better (rough estimate) | 232 |
Source: DVSA MOT bulk data · Window: 2019–2024 · n = 2,273 (initial tests) · Method: observed failures against those expected for the same model at the same ages, test-year level adjusted; verdict follows the printed one-decimal bound · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
How to cite this page
MOT Risk Index (2026). Mercedes-Benz B 2019 MOT statistics (data release dvsa-2024-v2; full dataset motriskindex-families-2024-v5, DOI 10.5281/zenodo.22975051), updated 30 September 2026. motriskindex.co.uk/cars/mercedes-b/2019/
How every figure is calculated: methodology. Age, test year and build year are tied together (age = test year − build year), so the test-year level is taken as observed, not estimated.
Other pages for this model
Mercedes-Benz B 2014 · Mercedes-Benz B by postcode area · Mercedes-Benz B body, chassis and structure failures · Mercedes-Benz B brakes failures · Mercedes-Benz B lamps, reflectors and electrics 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