Tyre has a bulge on the Mercedes-Benz Cls

Tyre has a bulge on the Mercedes-Benz Cls is recorded on 1,767 tests — 2.1% of all its MOT tests, against 0.9% across every car in the data. That is 2.3× the national share.

Is this unusual for this model?

Compared with	What it says
Every car in the data	0.9% of tests record it — this model is 2.3× that share
The 361 models compared	13 of 361, highest first
The model's own record	82,706 tests · every year of the Cls →

A share of tests is not a probability for your car: it counts every Mercedes-Benz Cls 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 2005, 0.6% of this model's tests recorded it; in 2019, 1.4%. The share has risen 0.8 points over that time. Worst year 2019 at 1.4%; best 2011 at 0.5%.

Year	Failures recorded	Tests	Share of tests
2005	39	6,722	0.6%
2006	92	9,914	0.9%
2007	90	12,178	0.7%
2008	70	9,812	0.7%
2009	77	12,042	0.6%
2010	49	7,820	0.6%
2011	60	12,213	0.5%
2012	79	11,787	0.7%
2013	238	33,060	0.7%
2014	148	12,668	1.2%
2015	264	19,884	1.3%
2016	188	21,723	0.9%
2017	141	10,156	1.4%
2018	89	6,450	1.4%
2019	100	7,116	1.4%

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 £45–£95 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

Tyre has a bulge: every model, every year → — the item's own page, with the part guide.
Mercedes-Benz Cls MOT pass rate by year → — the model's whole record, and what else it fails on.
Every Mercedes-Benz model →