2009 Mercedes C 2.1L Diesel · HO55 ABD

The vehicle’s roadworthiness has deteriorated sharply in the past six months, culminating in a critical failure on 2026-01-29—just weeks before the latest pass on 2026-02-03. The January failure was severe, with structural corrosion in the subframe and boot floor compromising integrity, alongside binding brake discs and an insecure battery mount. While the February retest cleared these issues, the presence of advisories in earlier years—such as corroded brake pipes, worn ball joints, and subframe rust—suggests a pattern of deferred maintenance rather than sudden neglect. The most concerning trend is the progression of corrosion in load-bearing areas, which, if not addressed, risks accelerating structural degradation. Brakes, too, show signs of inconsistent servicing, with pitting on discs and fluid contamination noted as early as March 2024. Mileage accumulation has been steady at around 7,300 miles annually, typical for a 17-year-old vehicle, with no sudden spikes or prolonged inactivity. The last three MOTs span roughly 18 months, covering 7,177 miles between 2024 and 2026, indicating regular but not excessive use. There are no red flags in the mileage pattern itself, though the clustering of failures in early 2026—despite a clean test just 12 months prior—implies either recent changes in ownership or a deliberate delay in addressing known issues. A prospective buyer should prioritise a thorough inspection of the subframe and boot floor for hidden corrosion, particularly around welds and mounting points, as these were flagged as structurally compromised. The brake system demands immediate attention: both front discs showed pitting in January 2026, and corroded brake pipes were noted as early as March 2024, suggesting potential fluid leaks or binding calipers. Suspension components—specifically the front ball joints and wheel bearings—should be checked for play or wear, as slight movement was recorded in 2024 and may have worsened. Finally, verify that all previously noted advisories have been rectified, especially the insecure battery mount and headlamp obstruction, as these could indicate broader issues with vehicle security or compliance.