2006 Mercedes-Benz CLS 5.5L Petrol · A14 OBN

A recurring pattern of front-end suspension wear and rear brake deterioration dominates this twenty-year-old Mercedes-Benz CLS, with two dangerous failures logged across the testing period and a steady stream of component advisories that have yet to fully clear. The most recent test on 14 October 2025 recorded a clean pass with no advisories, which is the only blemish-free result in the available record and suggests that the most pressing items flagged in earlier years have been addressed. However, the underlying history is not without concern: a dangerous nearside rear brake pad fitment failure in October 2023 was accompanied by a pitted rear brake disc advisory that has been flagged repeatedly since 2021, and a dangerous fractured nearside front road wheel in October 2020 underscores that critical safety items have required replacement. Front suspension components, including a nearside track rod end with slight play, a lower arm ball joint with slight play, and a worn suspension arm pin or bush, have been flagged across consecutive tests, indicating that steering and suspension wear is an ongoing consideration rather than a resolved issue. Mileage accumulation across the recorded tests indicates relatively consistent annual use, with the odometer climbing from an implied lower figure at the 2020 tests through to 130,292 miles by the 2025 pass. Based on the vehicle registration year and the spread of test dates, annual mileage averages roughly in the region of six to seven thousand miles per year, which is unremarkable for a vehicle of this age and avoids the extremes of either severe short-running or very high annual accumulation. The record shows testing at roughly annual intervals with no multi-year gaps, which means the recorded advisories and failures offer a fairly continuous snapshot of the vehicle's mechanical state rather than a picture distorted by long periods off the road. Sustained use of this nature typically accelerates wear on consumable braking components and suspension bushes, and the pattern of advisories in those areas is consistent with a car that has been driven regularly rather than left standing. For a prospective buyer, the priority areas on inspection are the front suspension and steering geometry, the rear braking system, and the wheels and tyres. The nearside front suspension arm pin or bush, the lower arm ball joint, and the nearside track rod end have all shown play in recent years, so on a test drive listen for clonks or knocks over speed humps and uneven road surfaces, particularly from the front nearside corner, and feel for any vagueness or delay in steering response that could indicate worn linkages. The rear brake discs have been flagged as pitted or scored in three consecutive tests from 2021 to 2023, which warrants a close check for brake shudder under firm pedal application, any grinding or scraping noises from the rear axle, and uneven pad wear on the rear calipers, as the 2023 dangerous failure specifically involved incorrectly mounted rear brake pads. Given the documented fractured front road wheel and the rear tyre wear advisories from 2020, a thorough inspection of all four wheels and tyres is advisable, paying particular attention to any cracks, buckling, or corrosion around the rim bead seats, and confirming that replacement tyres are wearing evenly across the full tread width rather than on one shoulder, which would point to alignment or suspension geometry issues. The exhaust mounting defects noted on both rear mounts in 2020 should also be confirmed as resolved, as separated exhaust sections can introduce noise and, in severe cases, foul against underbody components. Finally, although the 2025 pass is clean, the cumulative history of suspension and brake advisories means that budgeting for front suspension refreshment and possible rear brake disc and pad replacement within the near term would be a prudent precaution before committing to purchase.