2009 Mercedes-Benz E 3.0L Diesel · WM09 HCC

The most recent MOT test on the 2009 Mercedes-Benz E recorded a passing outcome with several persistent advisories and minor failures, indicating a stable but concerning maintenance trend. While the vehicle has not failed any tests, the recurring issues—particularly the severely deteriorated ball joint dust covers on the front anti-roll bar linkages and persistent oil leaks—suggest ongoing wear and potential long-term mechanical stress. The front suspension ball joints, already showing significant deterioration across multiple MOTs, may indicate progressive joint failure, which could lead to excessive play, suspension binding, or even suspension arm misalignment if left unaddressed. The tyre wear advisories, particularly the nearside rear tyre cracking and edge wear, also warrant attention, as these patterns often correlate with alignment or camber issues or prolonged standing, which can accelerate tyre degradation. The recorded mileage of 147,047 miles over approximately 17 years represents an average of around 8,650 miles annually, which is within the expected range for a vehicle of this age and class. However, the lack of a more recent MOT in the last two years, combined with the relatively high mileage, raises concerns about potential under-maintenance or prolonged periods of inactivity. Prolonged idling can exacerbate oil leaks, accelerate tyre perishing, and contribute to corrosion in standing components such as brake discs, calipers, and suspension linkages. The oil leak advisories, while not excessive, may indicate a failing seal or gasket, which, if not rectified, could lead to engine oil consumption or further internal damage over time. For the prospective buyer, the most critical areas to inspect are the front suspension components, particularly the anti-roll bar linkages and ball joints. During a test drive, listen for unusual clunking or rattling noises from the front suspension, which could indicate loose or failing suspension arms, bushings, or ball joints. Check for uneven tyre wear patterns, which may suggest misaligned wheels or warped brake discs, and inspect the brake system for any signs of pulsation or shuddering, which could point to warped discs or binding calipers. The oil leak advisories necessitate a thorough inspection of the engine bay for oil stains or wet spots under the vehicle, focusing on the oil filter housing, valve cover gaskets, and rear main seal area. Additionally, verify the condition of the rear tyres, ensuring the cracking and perishing noted in the MOT history do not extend into dangerous areas, and consider replacing them if they are significantly worn or damaged. Given the vehicle’s age and the maintenance history, a comprehensive pre-purchase inspection should include a check of the tyre sidewall for signs of cracking or perishing, which can compromise tyre integrity over time. Inspect the battery terminals and condition for corrosion or poor connections, as standing vehicles can accelerate battery degradation. Verify that the service book records are up to date, particularly for fluid servicing such as brake fluid, coolant, and engine oil, as these fluids can degrade over time regardless of mileage. Finally, assess the structural integrity of the vehicle, particularly around the front suspension and exhaust system, for any signs of rust or damage that could compromise safety or performance. If the vehicle has been in use, ensure that the annual mileage does not exceed 10,000 miles per year, as this could accelerate wear on consumables and suspension components.