2005 Mercedes C 1.8L Petrol · DA55 CVE

A clear pattern of underbody corrosion and brake hydraulic deterioration defines this Mercedes C-Class, with the most recent test on 30 June 2026 recording as a pass but carrying five advisories that mirror those from the previous identical attempt. Both the near and offside rear brake pipes are flagged as corroded, the rear brake hose ferrules show slight corrosion on both sides, and the rear subframe along with the front anti-roll bar are recorded as corroded though not seriously weakened. The 11 June 2025 test was far more serious, producing a fail with two majors: a fractured offside front coil spring and a nearside front service brake causing the vehicle to swerve to the nearside, which alongside a worn front brake disc and recurring rear brake pipe advisories points to genuine wear rather than minor cosmetic issues. The 2024 pass was broadly cleaner, with advisories for worn front anti-roll bar pin or bush both sides, a non-excessive front oil leak, a worn nearside front lower suspension arm pin or bush, a binding nearside front service brake, and slight tyre damage, all of which were carried forward and have since been joined by the corrosion advisories now appearing on the rear structure and hydraulic lines. At 155,871 miles over approximately 21 years, the vehicle has covered around 7,422 miles annually, which sits comfortably within typical usage expectations for its age and class. The recorded test dates show consistent annual attendance with no multi-year gaps that might suggest a prolonged period off the road, and the mileage progression is steady rather than erratic. This level of use is sufficient to keep mechanical components functioning but also represents enough accumulated wear that consumable items such as coil springs, brake discs, and suspension bushes are now surfacing as concerns, consistent with the 2025 majors. The combination of moderate mileage and visible corrosion on structural and hydraulic items suggests the vehicle has been used regularly throughout its life, with its current state reflecting genuine age-related deterioration rather than neglect from disuse. For a prospective buyer, the rear brake pipe corrosion and subframe corrosion merit close physical inspection, as these items tend to progress between tests and can move from advisory to failure status quickly on a 21-year-old chassis. On a test drive, listen for any knocking or clonking from the rear underframe over rough roads, as corroded mounting points and brake line ferrules can loosen and produce audible movement. The front suspension warrants particular attention following the fractured offside front coil spring recorded in 2025; any replacement should be confirmed and the opposite nearside spring checked for similar fatigue, since coil springs often deteriorate in pairs. Check for uneven braking pull to either side, especially under moderate pedal pressure, as the nearside front service brake swerve defect of 2025 and the binding caliper advisory of 2024 indicate a recurring front brake issue that may resurface. The front anti-roll bar and its link bushes, together with the nearside front lower suspension arm pin or bush, should be inspected for free play by hand when cold, as worn bushes contribute to vague steering response and a faint knocking over uneven surfaces. The front oil leak noted in 2024 should be checked for progression by inspecting the underside of the engine and the surrounding components for fresh staining or weeping that has worsened since the last assessment. During the test drive, pay attention to steering returnability and any reluctance to self-centre, which would indicate wear in the front linkage. The rear brake hose ferrules showing slight corrosion should be examined for cracking or seepage around the union, and a firm brake pedal with no sponginess should be confirmed. Given the age and the recurring underbody corrosion pattern documented across consecutive tests, budgeting for brake hydraulic renewal and continued monitoring of the rear subframe is sensible, with a borescope or ramp inspection advisable to verify the structural integrity remains within advisory limits rather than approaching a failure classification at the next test.