Mercedes-Benz Cla-Class common problems by mileage
What UK MOT testers flag on the Mercedes-Benz Cla-Class at each age and mileage, compared with all cars.
In 54,471 UK MOT tests of the Mercedes-Benz Cla-Class in 2023, the problem that most sets it apart from other cars is srs malfunction indicator lamp (warning lamp indicates a fault): recorded on 3.3% of tests of 2013–2015 cars at 120k–140k mi (193k–225k km), 5.5× the rate for all cars of that age and mileage. Other stand-out issues: tyres (ply or cords exposed) (2.9×); tyres (slightly damaged/cracking or perishing) (2.8×); tyres (a cut but not deep enough to reach the ply or cords) (3.1×). The most common reasons a Mercedes-Benz Cla-Class fails its MOT are tyres (tread depth below requirements of 1.6mm); tyres (ply or cords exposed); tyres (a cut in excess of the requirements deep enough to reach the ply or cords).
Last updated: · Source: DVSA anonymised MOT data 2023
What stands out on the Mercedes-Benz Cla-Class
Parts that MOT testers flag clearly more often on the Mercedes-Benz Cla-Class than on all cars of the same age at the same mileage (at least 1.5× the rate and 3% of tests).
| Issue | Type | First used | Mileage | Share of tests | All cars this age | Ratio | Tests |
|---|---|---|---|---|---|---|---|
| SRS malfunction indicator lamp: warning lamp indicates a fault | MOT fail | 2013–2015 | 120k–140k mi (193k–225k km) | 3.3% | 0.6% | 5.5× | 717 |
| Tyres (condition): has ply or cords exposed | MOT fail | 2014–2016 | 40k–60k mi (64k–97k km) | 3.2% | 1.1% | 2.9× | 5,048 |
| Tyres (condition): slightly damaged/cracking or perishing | Advisory | 2020–2022 | 0k–20k mi (0k–32k km) | 9.9% | 3.5% | 2.8× | 2,622 |
| Tyres (condition): has a cut but not deep enough to reach the ply or cords | Advisory | 2016–2018 | 0k–20k mi (0k–32k km) | 4% | 1.3% | 3.1× | 844 |
| Tyres (tread depth): worn close to legal limit/worn on edge | Advisory | 2019–2021 | 0k–20k mi (0k–32k km) | 12% | 6.4% | 1.8× | 4,123 |
| Tyres (tread depth): tread depth below requirements of 1.6mm | MOT fail | 2019–2021 | 40k–60k mi (64k–97k km) | 4.3% | 2.3% | 1.9× | 2,877 |
| Malfunction indicator lamp: inoperative or indicates a malfunction | MOT fail | 2014–2016 | 120k–140k mi (193k–225k km) | 3.6% | 1.6% | 2.3× | 720 |
| Tyres (condition): has a cut in excess of the requirements deep enough to reach the ply or cords | MOT fail | 2020–2022 | 40k–60k mi (64k–97k km) | 4.4% | 2.1% | 2.1× | 1,058 |
Mercedes-Benz Cla-Class by mileage (2018–2020 cars)
The most-tested first-use years. For each mileage band: how many MOT tests, the most common item, and the item that stands out most against other cars.
| Mileage | Tests | Most common | Stands out |
|---|---|---|---|
| 0k–20k mi (0k–32k km) | 4,533 | Tyres (tread depth): worn close to legal limit/worn on edge (11%) | Tyres (tread depth): worn close to legal limit/worn on edge (11%, 1.7×) |
| 20k–40k mi (32k–64k km) | 11,987 | Tyres (tread depth): worn close to legal limit/worn on edge (15%) | — |
| 40k–60k mi (64k–97k km) | 5,820 | Tyres (tread depth): worn close to legal limit/worn on edge (18%) | Tyres (tread depth): tread depth below requirements of 1.6mm (3.7%, 1.5×) |
| 60k–80k mi (97k–129k km) | 1,514 | Tyres (tread depth): worn close to legal limit/worn on edge (21%) | Tyres (condition): has ply or cords exposed (3.4%, 2.6×) |
| 80k–100k mi (129k–161k km) | 415 | Tyres (tread depth): worn close to legal limit/worn on edge (17%) | Brake discs: worn, but not excessively (4.8%, 1.7×) |
Mercedes-Benz Cla-Class by first-use year
| First used | Tests | Biggest stand-out issue |
|---|---|---|
| 2013 | 2,150 | Brake discs: worn, but not excessively at 120k–140k mi (193k–225k km) (1.9×) |
| 2014 | 4,437 | SRS malfunction indicator lamp: warning lamp indicates a fault at 120k–140k mi (193k–225k km) (5.5×) |
| 2015 | 6,947 | Tyres (condition): has ply or cords exposed at 40k–60k mi (64k–97k km) (2.9×) |
| 2016 | 7,792 | Tyres (condition): has ply or cords exposed at 120k–140k mi (193k–225k km) (2.9×) |
| 2017 | 8,307 | Tyres (condition): has a cut but not deep enough to reach the ply or cords at 0k–20k mi (0k–32k km) (3.1×) |
| 2018 | 8,431 | Tyres (condition): has ply or cords exposed at 60k–80k mi (97k–129k km) (2.8×) |
| 2019 | 8,420 | Tyres (condition): has ply or cords exposed at 60k–80k mi (97k–129k km) (2.6×) |
| 2020 | 7,578 | Tyres (condition): has ply or cords exposed at 60k–80k mi (97k–129k km) (2.9×) |
| 2021 | 399 | Tyres (condition): slightly damaged/cracking or perishing at 0k–20k mi (0k–32k km) (2.8×) |
How these numbers are made
From the DVSA anonymised MOT data for 2023: every normal MOT test of a car in Great Britain, with its mileage and every advisory and failure item. For each first-use year (pooled with the years either side) and 20,000-mile band we count the share of tests where a part was recorded, and compare it with the same share for every car of that age at that mileage. A cell is shown only with 300 or more tests. Advisories are tester notes, not failures. Figures describe UK-market cars; engines and equipment can differ in other countries.
Contains public sector information licensed under the Open Government Licence v3.0 (DVSA anonymised MOT data, 2023).
Frequently asked questions
What are the most common problems with the Mercedes-Benz Cla-Class?
In 54,471 UK MOT tests of the Mercedes-Benz Cla-Class in 2023, the problem that most sets it apart from other cars is srs malfunction indicator lamp (warning lamp indicates a fault): recorded on 3.3% of tests of 2013–2015 cars at 120k–140k mi (193k–225k km), 5.5× the rate for all cars of that age and mileage. Other stand-out issues: tyres (ply or cords exposed) (2.9×); tyres (slightly damaged/cracking or perishing) (2.8×); tyres (a cut but not deep enough to reach the ply or cords) (3.1×). The most common reasons a Mercedes-Benz Cla-Class fails its MOT are tyres (tread depth below requirements of 1.6mm); tyres (ply or cords exposed); tyres (a cut in excess of the requirements deep enough to reach the ply or cords).
Why do Mercedes-Benz Cla-Classs fail the MOT?
Across 54,471 MOT tests in 2023, the most common failure items on the Mercedes-Benz Cla-Class were tyres (tread depth below requirements of 1.6mm) (3.2% of tests); tyres (ply or cords exposed) (3% of tests); tyres (a cut in excess of the requirements deep enough to reach the ply or cords) (2.6% of tests).
At what mileage do Mercedes-Benz Cla-Class problems start?
The clearest Mercedes-Benz Cla-Class-specific issue, srs malfunction indicator lamp (warning lamp indicates a fault), peaks against other cars at 120k–140k mi (193k–225k km) on 2013–2015 cars (3.3% of tests vs 0.6% for all cars that age).
Where does this Mercedes-Benz Cla-Class data come from?
From the UK government's anonymised MOT test data (DVSA, 2023, Open Government Licence v3.0): 54,471 tests of the Mercedes-Benz Cla-Class. VinSnap shows the same numbers for your own car's age and mileage in the app.