2005 Mercedes-Benz C 1.8L Petrol · YC05 KLU

A consistent thread of corrosion advisories and recurring suspension wear defines the mechanical record of this 2005 Mercedes-Benz C-Class. Across every test since 2020, the rear sub-frame, rear suspension component mounting prescribed areas, and front coil springs have been progressively flagged for surface oxidation, with the rear sub-frame corrosion noted on three consecutive tests from 2023 to 2025. On the latest examination dated 20 September 2025 the vehicle passed, but a slight play in the nearside track rod end ball joint was recorded for the second year running, alongside the ongoing rear sub-frame and rear mounting area corrosion advisories. This pattern points to a chassis now over two decades old in which structural and suspension components are gradually deteriorating even though they have not yet crossed the threshold into test failure. Recorded mileage of 107,034 miles over approximately twenty-one years equates to an average annual accumulation of around 5,100 miles, which is well below the typical figure for a car of this age. Two extended gaps are notable: between the April 2019 pass and the October 2020 retest the vehicle covered no recorded mileage for the purpose of MOT history, and the 2021 test took place nearly a year after the 2020 failure. Despite this low usage, the chassis still shows the classic age-related oxidation seen on higher-mileage contemporaries, suggesting that the car has experienced sufficient road exposure and moisture cycles for corrosion to take hold. The repeated advisories for undercarriage corrosion in 2020 and the steadily accumulating rust defects since then reflect this long-term environmental exposure rather than any single maintenance lapse. A prospective buyer should focus on the specific components that have appeared repeatedly. The nearside track rod end ball joint has carried a slight-play advisory in both 2023 and 2025, so on a test drive any front-end knocking over uneven surfaces, vagueness in steering response, or uneven tyre shoulders should prompt immediate inspection. The front brake discs were first flagged as pitted or scored in 2020, reappeared in 2022 and 2023, and remain candidates for replacement, particularly if the brake pedal feels gritty or the vehicle pulls under heavy braking. The persistent front anti-roll bar ball joint and lower suspension arm ball joint dust cover deterioration from 2022 and 2023 indicates dried and split boots that may have allowed water ingress into the joints, so listen for clonking or creaking from the front suspension when traversing speed bumps or rough tarmac. The rear of the vehicle deserves particular attention. The rear sub-frame has been noted as corroded but not seriously weakened across three consecutive tests, and the rear suspension component mounting prescribed areas have been flagged for corrosion on every test since 2022. Buyers should inspect the rear mounting zones with a torch for any flaking, bubbling under paint, or white deposits, and watch for the rear of the car sitting lower than expected under load. The 2022 advisory for an oil leak, although described as not excessive, should also be followed up by checking the underside for fresh staining on the engine and gearbox, and by monitoring oil levels between services. Finally, given the failed 2020 test for an insufficient windscreen washer supply, confirming that all washers operate correctly before purchase is a worthwhile precaution.