MOT fail rates by first-use year
2014 Mercedes-Benz CLA MOT fail rate and common faults
How Mercedes-Benz CLA cars first used in 2014 did at their MOTs from 2022 to 2025, against all cars of the same age. From 17,655 DVSA MOT tests of these cars. First use is usually the date the car was first registered.
MOT data updated
At 11 years, tested in 2025
What stands out
- In 2025, at 11 years old, Mercedes-Benz CLA cars first used in 2014 failed 28.0% of MOTs (4,302 tests), 5.3 points below the 33.3% for all cars that age.
- From 2022 to 2025, as these cars went from 8 to 11 years old, the fail rate moved from 20.4% to 28.0%.
- Mercedes-Benz CLA cars first used a year earlier, in 2013, failed 28.3% at the same age of 11 years (2,145 tests, in 2024).
- The most common fail item that is not a wear item, for the Mercedes-Benz CLA at 11 years, is coil spring broken, at 4.5 per 100 MOTs (all cars: 3.6).
MOT fail rate by test year
| Test year | Age | MOT fail rate | Tests (n) | All cars | Difference |
|---|---|---|---|---|---|
| 2022 | 8 years | 20.4% | 4,500 | 23.8% | −3.4 pts |
| 2023 | 9 years | 23.6% | 4,479 | 27.1% | −3.5 pts |
| 2024 | 10 years | 26.6% | 4,374 | 30.3% | −3.7 pts |
| 2025 | 11 years | 28.0% | 4,302 | 33.3% | −5.3 pts |
Most common faults at 11 years
These figures cover all Mercedes-Benz CLA MOTs at 11 years: cars first used 2013 to 2014, tested 2022 to 2025 (n=6,447). The list uses every first-use year so it has enough tests. Wear items (tyres, brake pads, wipers, bulbs) say more about upkeep than about the design.
MOT fail items
| Fail item | Per 100 MOTs | All cars |
|---|---|---|
| Coil spring broken | 4.5 | 3.6 |
| Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt | 3.5 | 0.9 |
| Tyre tread below 1.6 mm Wear | 2.9 | 2.8 |
| Airbag (SRS) warning light on | 2.6 | 0.5 |
| Engine warning lamp at the petrol emissions check: not working or showing a fault | 2.5 | 0.9 |
| Tyre with cords exposed Wear | 2.4 | 1.6 |
| Dipped headlight not working Wear | 2.1 | 1.9 |
| Washers: provides insufficient washer liquid Wear | 2.0 | 1.6 |
| Brake pads under 1.5 mm Wear | 1.7 | 2.1 |
| Tyre condition: has a cut in excess of the requirements deep enough to reach the ply or cords Wear | 1.6 | 1.3 |
Per 100 of the MOTs above (n=6,447). A test with two items counts once for each.
Advisories
| Advisory | Per 100 MOTs | All cars |
|---|---|---|
| Tyre tread close to the legal limit or worn on the edge Wear | 17.6 | 17.6 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 11.3 | 10.0 |
| Brake pads wearing thin Wear | 8.3 | 7.8 |
| Tyre condition: slightly damaged/cracking or perishing Wear | 6.1 | 8.7 |
| Linkage ball joint dust cover: ball joint dust cover severely deteriorated | 4.1 | 0.7 |
| Brake discs: worn, but not excessively | 4.1 | 2.6 |
| Windscreen: damaged but not adversely affecting driver's view | 3.1 | 2.6 |
| Tyre tread close to the legal limit, under the 1.0 mm rule Wear | 2.9 | 2.3 |
| Coil spring: corroded | 2.9 | 3.8 |
| Tyre condition: has a cut but not deep enough to reach the ply or cords Wear | 2.6 | 1.2 |
Per 100 of the MOTs above (n=6,447). A test with two items counts once for each.
Fuel type at 11 years
These figures cover all Mercedes-Benz CLA MOTs at 11 years: cars first used 2013 to 2014, tested 2022 to 2025 (n=6,447). Each fuel is set against all cars of the same fuel and age. Fuels with fewer than 1,000 tests are not shown.
| Fuel | Share of tests | MOT fail rate | Tests (n) | All cars, same fuel | Median mileage |
|---|---|---|---|---|---|
| Diesel | 57.7% | 28.6% | 3,719 | 34.3% | 98,480 miles |
| Petrol | 42.3% | 27.3% | 2,728 | 32.5% | 83,124 miles |
Fail rate by mileage at 11 years
These figures cover all Mercedes-Benz CLA MOTs at 11 years: cars first used 2013 to 2014, tested 2022 to 2025 (n=6,447). At 11 years, Mercedes-Benz CLA cars at 90,000 to 120,000 miles failed more often (31.8%, n=2,097) than those at 60,000 to 90,000 miles (26.1%, n=2,240). Bands with fewer than 1,000 tests are not shown.
| Mileage at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|
| 60,000 to 90,000 miles | 26.1% | 2,240 | 34.2% |
| 90,000 to 120,000 miles | 31.8% | 2,097 | 37.8% |
Car tax rules for a 2014 car
- Cars first registered from 1 March 2001 to 31 March 2017 are taxed by CO2 emissions band, from band A (the lowest emissions) to band M. The band is set by the CO2 figure on the V5C logbook.
These are the rules, not the amount for a specific car. Car tax check
ULEZ and clean air zones
- Petrol cars first registered from 2006 usually meet Euro 4, the petrol standard for the London ULEZ, so they usually do not pay the daily charge.
- Diesel cars first registered before September 2015 usually do not meet Euro 6, so a 2014 diesel usually pays the ULEZ daily charge. A few models met Euro 6 early.
- The clean air zones in Birmingham and Bristol use the same Euro 4 petrol and Euro 6 diesel standards. The low emission zones in Scotland use them too, but enforce them with fines, not a daily charge.
The Euro standard of the car decides, not the year alone. ULEZ checker
Other years of the Mercedes-Benz CLA
Other Mercedes-Benz models first used in 2014
| Model | Age at test | MOT fail rate | Tests (n) | All cars |
|---|---|---|---|---|
| Mercedes-Benz C-Class (2014) | 11 years in 2025 | 24.7% | 25,362 | 33.3% |
| Mercedes-Benz A-Class (2014) | 11 years in 2025 | 30.4% | 23,343 | 33.3% |
| Mercedes-Benz E-Class (2014) | 11 years in 2025 | 24.6% | 19,599 | 33.3% |
| Mercedes-Benz B-Class (2014) | 11 years in 2025 | 28.1% | 8,256 | 33.3% |
| Mercedes-Benz SLK (2014) | 11 years in 2025 | 23.5% | 4,808 | 33.3% |
| Mercedes-Benz M-Class (2014) | 11 years in 2025 | 20.2% | 3,810 | 33.3% |
| Mercedes-Benz GLA (2014) | 11 years in 2025 | 20.9% | 3,462 | 33.3% |
| Mercedes-Benz Citan (2014) | 11 years in 2025 | 46.4% | 2,012 | 33.3% |
More on the Mercedes-Benz CLA
Found one you might buy? Vet the specific car.
These figures describe 2014 Mercedes-Benz CLA cars as a group, not any one car. The VetTheCar Buying Report looks at the car you are buying: its MOT history, what similar cars did next, and what to ask the seller.
Source
Contains public sector information licensed under the Open Government Licence v3.0. Source: DVSA anonymised MOT test data, class 4 normal MOT tests, 2022 to 2025. MOT data updated 28 September 2026.
Not affiliated with or endorsed by DVSA. How we calculate these figures · Data sources
Car tax and clean air zone rules are summarised from GOV.UK and Transport for London guidance. They are general rules and are not drawn from the MOT data.