2020 Mercedes-Benz E 2.9L Diesel · LS20 OSP

The most recent MOT test on the 2020 Mercedes-Benz E was conducted on 2026-04-17 and resulted in a passing outcome, with no defects recorded. However, the vehicle’s MOT history reveals a pattern of advisories and a single major failure, indicating that while the vehicle has maintained roadworthiness in recent MOT tests, underlying mechanical wear has been identified. The failure in August 2023 highlighted a critical issue with the offside front lower suspension arm ball joint, which was deemed excessively worn, a condition that compromises steering stability and alignment. This failure, combined with the nearside front tyre advisory from the same test, suggests that the suspension components and tyres have been subject to accelerated wear, potentially due to heavy or uneven loading, poor alignment, or prolonged periods of standing in a way that exacerbates joint and tread degradation. The subsequent passing MOTs imply that the wear may not yet have progressed to a point of immediate failure but warrants close monitoring, as the ball joint failure could lead to binding, excessive play, or even catastrophic suspension failure if left unaddressed. The vehicle’s recorded mileage of 66,796 miles at the time of this assessment represents a moderate annual usage rate of approximately 11,133 miles per year, which is within the expected range for a six-year-old car of this class. However, the MOT history suggests that the vehicle may have experienced periods of either lighter use or prolonged standing, as the advisories and failure do not align neatly with typical mileage-driven wear patterns. Suspension components, particularly ball joints, are highly susceptible to corrosion and wear when exposed to moisture or when the vehicle remains stationary for extended durations, especially in a parked position. The offside front lower suspension arm ball joint failure indicates that the joint may have been subjected to corrosion or excessive stress from standing, leading to premature failure. Additionally, the nearside front tyre wear pattern—particularly the edge wear—could suggest misalignment, underinflation, or uneven loading, which again may have been exacerbated by prolonged inactivity or improper handling. For the prospective buyer, the most critical immediate actions should focus on the suspension system and tyre condition. On inspection, verify that the offside front lower suspension arm ball joint is free from corrosion, binding, or excessive play when the vehicle is lifted and the suspension is cycled. Listen for unusual noises, such as clunks or rattles, particularly when driving over bumps or at low speeds, which may indicate joint failure or suspension bush wear. The nearside front tyre should be checked for tread depth and sidewall integrity; any further edge wear or cracking could compromise traction and safety. A test drive should include checking for uneven tyre wear, steering pull, or excessive vibration, which may signal misalignment or suspension issues. Given the ball joint failure, it is advisable to have the suspension arm and ball joint replaced promptly, ideally within the next 1,000 to 2,000 miles, to prevent further damage to the steering system or wheel alignment. Additionally, the tyre wear history suggests that the vehicle may have required recent alignment work, and this should be addressed to prevent further tread degradation. Beyond the immediate concerns, the buyer should conduct a thorough inspection of the vehicle’s structural and fluid-based components. Given the vehicle’s age and mileage, check the tyres for signs of perishing or cracking in the sidewalls, which can weaken the rubber and reduce safety. Inspect the 12V battery for corrosion on terminals, swelling, or reduced cranking power, as these issues are common in older vehicles and can lead to starting problems or electrical failures. The brake system should be examined for signs of corrosion on discs, particularly on the nearside front where standing may have accelerated oxidation, and check for binding calipers or uneven brake pad wear. Fluid levels should be topped up to manufacturer specifications, with particular attention to the engine oil, brake fluid, and coolant, as these fluids degrade over time even with low mileage. Finally, review the service history to confirm that the vehicle has received scheduled maintenance, such as valve adjustments, timing belt replacement, and exhaust system checks, as these are critical for long-term reliability. If the service book is incomplete or missing, arrange for a comprehensive service to ensure all time-based maintenance tasks have been completed.