2008 Mercedes-Benz C 3.0L Diesel · DK05 ARM

The latest MOT test result for the 2008 Mercedes C recorded on 2025-11-27 was a pass, though this follows a series of failures in the preceding two years, notably in 2024-11-26 and 2025-11-26. The pattern of failures and advisories suggests a deterioration in the vehicle’s suspension system, particularly the near- and offside front coil springs and suspension arms, which were classified as major defects in the most recent failure. While the 2025 test did not repeat these failures, the presence of persistent advisories—such as the offside front drop link showing slight play and the near- and offside front wheel bearings exhibiting slight play—indicates ongoing wear that may escalate if not addressed. The advisories on brake pipe corrosion and oil leaks also warrant attention, as these can lead to more serious issues if left unchecked, such as brake system contamination or increased friction in moving parts. Overall, the maintenance trend is not improving; rather, it reflects a gradual but concerning decline in structural and functional integrity, particularly in the front suspension and braking components. The vehicle’s recorded mileage of 147,002 miles at 18 years old represents an annual usage rate of approximately 8,167 miles, which is within the expected range for a car of this age and class, particularly if it has been used for commuting or light road travel rather than high-mileage driving. However, the consistency of the mileage suggests either steady, moderate use or periods of prolonged inactivity, which can exacerbate wear from standing—such as corrosion in brake systems or fluid degradation. The lack of a significant spike in mileage over the past few years does not necessarily indicate better maintenance, as standing can accelerate deterioration in components like wheel bearings, suspension bushes, and brake pipes. For a vehicle of this age, the suspension arms and coil springs, which have failed multiple times, are particularly vulnerable to fatigue wear, especially given their load-bearing function and exposure to road irregularities. To proceed with a thorough inspection, the prospective buyer should prioritise examining the front suspension for signs of further damage beyond the recorded advisories. The near- and offside front wheel bearings showing slight play in previous MOTs may already be nearing end-of-life, given their repeated classification as advisories. During a test drive, listen for unusual noises from the front wheels, particularly grinding or whining, which could indicate bearing failure or misalignment. Inspect the front suspension arms and coil springs for any additional cracks, rust, or excessive deformation, as these could compromise ride quality and handling stability. The brake pipes, which have been corroded and greased in multiple tests, should be checked for leaks, cracks, or signs of contamination in the brake fluid reservoir. If the brake system is compromised, this could lead to reduced braking efficiency or even failure under load. For fluid and component checks, the buyer should verify the condition of the engine oil, transmission fluid, and brake fluid, as these can degrade over time even with moderate mileage. Given the vehicle’s age, the engine oil should be fresh and free of metallic particles or sludge, which could signal wear in the suspension or drivetrain. The brake fluid should be clear and not discoloured, as moisture contamination can lead to brake fluid absorption and reduced braking performance. Additionally, the 12V battery should be tested for voltage and charge retention, as standing vehicles can suffer from battery discharge or corrosion in terminals. For the tyres, despite the mileage being moderate, check for sidewall perishing or cracking, which can occur from prolonged exposure to UV light and temperature fluctuations. Finally, a thorough visual inspection of the exhaust system for leaks or corrosion is advisable, as oil leaks noted in previous MOTs could indicate a failing camshaft seal or valve cover gasket, leading to emissions issues or engine damage. If the vehicle has not been serviced recently, consider requesting service records to confirm the last oil change and fluid top-ups, as these are critical for maintaining engine and transmission longevity.