MOT performance
2009 Mercedes-Benz CLS: MOT pass rate and common failures
Of 2,330 MOT tests on 2009-registered Mercedes-Benz CLSs in 2023–2024 (on average 13.9 years old at test, median 109,632 miles), 64.0% passed first time, 10.4 points lower than the Mercedes-Benz CLS overall. Allowing for age, mileage and fuel, 2009 Mercedes-Benz CLSs failed 13% less often than comparable cars.
2,330 MOT tests on 1,241 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 64.0% | ±1.9 pts (95%), n = 2,330 |
| All Mercedes-Benz CLSs | 74.4% | n = 48,848 |
| Failures vs similar cars | 0.87× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 12.2% | n = 2,330 |
| Average age at test | 13.9 years | n = 2,330 |
Where 2009 Mercedes-Benz CLSs fail
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Suspension | 13.4% | -23% |
| Lights, reflectors and electrical | 12.1% | -35% |
| Tyres | 11.0% | +39% |
| Brakes | 9.7% | -13% |
| Driver's view of the road | 6.4% | +4% |
| Steering | 3.6% | -5% |
| Noise, emissions and leaks | 3.6% | -30% |
| Body, chassis and structure | 2.2% | -67% |
| Road wheels | 1.2% | +85% |
| Seat belts and airbags | 0.6% | -66% |
| Registration plates and VIN | 0.3% | -40% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Ball joint: ball joint excessively worn | Suspension | 5.67% |
| Coil spring: fractured or broken | Suspension | 4.76% |
| Rigid brake pipes: excessively corroded | Brakes | 4.72% |
| Condition: has ply or cords exposed | Tyres | 4.38% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 3.73% |
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About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.