Mercedes-Benz B-Class: reliability by registration year
2006-2022 · 17 registration years · 68,062 first tests
Registration years
First-attempt MOT results for every B-Class registration year with at least 500 first tests in 2025. Pass rates rise with newer cars, so read a year against its neighbours rather than against the top of the table. Years without their own report are listed here with the same figures.
| Year | First tests | First-attempt pass | Incl. PRS | Most common failure |
|---|---|---|---|---|
| 2022 | 1,216 | 90.8% | 93.1% | |
| 2021 | 1,727 | 91.8% | 93.1% | |
| 2020 | 2,786 | 89.9% | 91.5% | Tyre condition (rear) 22.1% |
| 2019 | 4,149 | 89.1% | 90.8% | Tyre condition (front) 19.6% |
| 2018 | 3,858 | 83.3% | 85.9% | Tyre condition (front) 22.9% |
| 2017 | 5,502 | 80.3% | 83.3% | Tyre condition (front) 17.5% |
| 2016 | 5,183 | 79.0% | 82.2% | Tyre condition (front) 16.5% |
| 2015 | 5,481 | 76.5% | 80.6% | Tyre condition (front) 15.4% |
| 2014 | 7,934 | 71.5% | 76.5% | Coil spring (rear) 13.6% |
| 2013 | 6,793 | 70.8% | 75.6% | Anti-roll bar linkage ball joint dust cover (front) 13.3% |
| 2012 | 5,571 | 69.2% | 74.2% | Anti-roll bar linkage ball joint dust cover (front) 13.4% |
| about 5 in every 100 better than the years either side. What most often failed a 2012 B-Class: Anti-roll bar linkage ball joint dust cover (front) (13.4%) · Coil spring (rear) (12.8%) · Tyre condition (front) (11.6%) | ||||
| 2011 | 3,257 | 58.4% | 65.9% | Side repeater indicators 12.0% |
| about 5 in every 100 worse than the years either side. What most often failed a 2011 B-Class: Side repeater indicators (12.0%) · Suspension arm ball joint (front) (11.4%) · Coil spring (rear) (9.3%) | ||||
| 2010 | 4,152 | 58.1% | 65.6% | Drive shaft joints and boots (front) 11.2% |
| 2009 | 3,849 | 57.8% | 65.0% | Drive shaft joints and boots (front) 14.6% |
| 2008 | 2,936 | 54.5% | 61.6% | Drive shaft joints and boots (front) 22.5% |
| 2007 | 2,116 | 54.8% | 63.5% | Drive shaft joints and boots (front) 19.3% |
| 2006 | 1,552 | 56.0% | 64.2% | Drive shaft joints and boots (front) 25.0% |