2009 Mercedes-Benz CLK MOT pass rate, common failures & what to check
In 2025, 60.6% of Mercedes-Benz CLKs first used in 2009 passed their MOT first time, against 58.3% for all cars first used in 2009. Across 8,722 CLK first tests from 2023 to 2025, the most common failure areas were suspension, lamps and electrical equipment and brakes.
This page analyses first MOT tests for Mercedes-Benz CLKs first used in 2009 (all trims grouped): 2021 to 2025 for the pass-rate trend, and 2023 to 2025 for the failure and advisory analysis — plus what is worth checking before you buy one.
Data: DVSA anonymised MOT tests to December 2025 · Calculated by SortedCars · Updated October 2026
How the 2009 Mercedes-Benz CLK MOT pass rate has changed
Share of first tests passed in each year, CLKs first used in 2009 against all cars first used in 2009 (any make or fuel; not adjusted for mileage, fuel or use). In 2025 the CLK figure was in line with the all-cars figure.
View this chart as a table
| Test year | 2009 CLK | All cars first used 2009 | CLK first tests |
|---|---|---|---|
| 2021 | 62.8% | 60.5% | 3,175 |
| 2022 | 61.6% | 60.1% | 3,189 |
| 2023 | 60.1% | 59.0% | 3,052 |
| 2024 | 60.9% | 58.4% | 2,922 |
| 2025 | 60.6% | 58.3% | 2,748 |
Common 2009 Mercedes-Benz CLK MOT failures
Share of the 3,444 failed first tests (2023–2025) with at least one failure in each area. A test can fail in more than one area, so the shares add up to more than 100%.
Most common failure items
| DVSA failure item | Share of failed first tests | Tests |
|---|---|---|
| Ball joint: excessively worn | 24.0% | 828 |
| Coil spring: fractured or broken | 21.5% | 739 |
| Tread depth: below requirements of 1.6mm | 9.1% | 312 |
| Linkage ball joint dust cover: ball joint dust cover no longer prevents the ingress of dirt | 7.1% | 243 |
| Rigid brake pipes: excessively corroded | 6.9% | 237 |
Item names are DVSA’s own wording. 2023–2025 combined.
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Typical repair costs for common MOT failures
Typical UK garage prices for the job, not for a CLK in particular, and not a quote.
| Failure item | Typical job | Typical UK price | Usual range |
|---|---|---|---|
| Ball joint: excessively worn | Ball joint replacement | £90 | £60–£150 |
| Coil spring: fractured or broken | Coil spring replacement | £248 | £175–£400 |
From published UK repair-cost guides, checked September 2026. Only jobs with a published typical price are shown.
What to check on a 2009 Mercedes-Benz CLK before buying
The three areas where failed first tests most often had a fault, 2023–2025.
- Suspension. Worth looking behind the front wheels with a torch at the coil springs, and listening for knocks over bumps on the test drive.
- Lamps and electrics. Ask someone to watch while you work the brake lights, indicators, sidelights, dipped and main beam, and the number-plate lamps.
- Brakes. Worth looking at the discs and pads through the wheel spokes for scoring and a worn lip, and noticing on the test drive whether the car pulls to one side or the pedal feels long.
Common 2009 Mercedes-Benz CLK MOT advisories
Advisories are points the tester noted that did not fail the car. Most common on 2009 CLKs, as a share of all 8,722 first tests, 2023–2025.
| DVSA advisory item | Share of first tests | Tests |
|---|---|---|
| Rigid brake pipes: corroded, covered in grease or other material | 21.4% | 1,868 |
| Tread depth: worn close to legal limit/worn on edge | 16.6% | 1,448 |
| Brake discs: worn, pitted or scored, but not seriously weakened | 10.6% | 926 |
| Brake pads: wearing thin | 8.9% | 778 |
| Suspension arm pins and bushes: pin or bush worn but not resulting in excessive movement | 8.6% | 752 |
Questions about the 2009 Mercedes-Benz CLK MOT
What is the MOT pass rate of a 2009 Mercedes-Benz CLK?
In 2025, 60.6% of CLKs first used in 2009 passed their MOT first time, against 58.3% for all cars first used in 2009. A car fixed during the test counts as a fail.
What does a 2009 CLK most often fail its MOT on?
Suspension (in 57.3% of failed first tests, 2023–2025), lamps and electrical equipment (28.3%) and brakes (26.5%). The single most common item was “Ball joint: excessively worn” (24.0%).
How often does a 2009 Mercedes-Benz CLK fail its MOT?
In 2025, 39.4% of first tests on CLKs first used in 2009 did not pass first time: 34.8% failed, and a further 4.6% had a fault fixed during the test (counted as a fail here). Across 2023–2025, 3,444 of 8,722 first tests did not pass first time.
What are the most common 2009 Mercedes-Benz CLK MOT advisories?
“Rigid brake pipes: corroded, covered in grease or other material” (on 21.4% of first tests, 2023–2025), “Tread depth: worn close to legal limit/worn on edge” (16.6%), “Brake discs: worn, pitted or scored, but not seriously weakened” (10.6%), “Brake pads: wearing thin” (8.9%) and “Suspension arm pins and bushes: pin or bush worn but not resulting in excessive movement” (8.6%).
Is a 2009 Mercedes-Benz CLK reliable?
An MOT pass rate shows what failed at the test, not how reliable a car is. For this group of cars the first-time pass rate went from 62.8% in 2021 to 60.6% in 2025. For one particular car, its own MOT history matters more than the average.
Other cars first used in 2009
The most-tested cars from the same year. Each page uses the same method.
2009 Ford Fiesta MOT statistics · 2009 Ford Focus MOT statistics · 2009 Vauxhall Corsa MOT statistics · 2009 Volkswagen Golf MOT statistics · 2009 Vauxhall Astra MOT statistics
Checking a specific 2009 CLK?
The numbers above cover every CLK first used in 2009 and tested in Great Britain. Our free check shows the actual MOT history, mileage record and tax status of the one you are looking at.
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