Linkage ball joint dust cover deteriorated on the Mercedes-Benz B-Class
Linkage ball joint dust cover deteriorated on the Mercedes-Benz B-Class is recorded on 6,136 tests — 2.7% of all its MOT tests, against 0.6% across every car in the data. That is 4.5× the national share.
Is this unusual for this model?
| Compared with | What it says |
|---|---|
| Every car in the data | 0.6% of tests record it — this model is 4.5× that share |
| The 240 models compared | 8 of 240, highest first |
| The model's own record | 230,643 tests · every year of the B-Class → |
A share of tests is not a probability for your car: it counts every Mercedes-Benz B-Class tested, whatever its mileage, service history and use. The like-for-like comparison on the model page is the fairer number.
Year by year
In 2006, 0.4% of this model's tests recorded it; in 2018, 0.3%. The share has barely moved over that time. Worst year 2009 at 3.9%; best 2018 at 0.3%.
| Year | Failures recorded | Tests | Share of tests |
|---|---|---|---|
| 2006 | 33 | 7,939 | 0.4% |
| 2007 | 246 | 10,497 | 2.3% |
| 2008 | 438 | 13,854 | 3.2% |
| 2009 | 660 | 17,014 | 3.9% |
| 2010 | 634 | 17,756 | 3.6% |
| 2011 | 483 | 13,890 | 3.5% |
| 2012 | 796 | 21,184 | 3.8% |
| 2013 | 957 | 25,542 | 3.8% |
| 2014 | 900 | 29,588 | 3.0% |
| 2015 | 458 | 19,625 | 2.3% |
| 2016 | 319 | 18,294 | 1.7% |
| 2017 | 161 | 19,194 | 0.8% |
| 2018 | 41 | 12,760 | 0.3% |
Years with fewer than 0.2% of tests recording the item are left out: a year with two failures in 400 tests is noise, and this table is not here to make noise look like a trend.
What it costs
A typical UK repair for this item is £18–£45 fitted. It is a job a careful owner can do at home. What the part is, and what to buy →
Prices are typical UK supply-and-fitting estimates, not quotes. What happens if it fails covers the retest rules.
Where this sits
- Linkage ball joint dust cover deteriorated: every model, every year → — the item's own page, with the part guide.
- Mercedes-Benz B-Class MOT pass rate by year → — the model's whole record, and what else it fails on.
- Every Mercedes-Benz model →