2020 Mercedes-Benz EQC 400 AMG Line Premium + 4M Electric · OA02 ADE

The most recent MOT test on 2026-08-13 resulted in a passing grade, though it did flag a minor front windscreen damage that does not impair driver visibility. However, the vehicle’s MOT history reveals a concerning pattern of recurring major failures related to the front suspension ball joints, which were identified as excessively worn in the 2026-08-08 test. These defects were not present in the previous two MOTs, indicating either a sudden or progressive wear issue that may stem from either aggressive cornering, poor alignment, or underlying structural fatigue in the suspension geometry. The presence of these major failures suggests that the vehicle has either been subjected to excessive stress or that the suspension components were not adequately maintained during its operational life. This trend warrants immediate attention, as ball joint failure can lead to steering instability, reduced handling precision, and increased risk of a rollover or loss of control, particularly at higher speeds or in adverse conditions. The vehicle’s recorded mileage of 65,525 miles for a 2020 model represents a moderate annual usage rate of approximately 10,921 miles per year, which is within the expected range for a luxury electric vehicle of this age and class. While lower mileage might suggest less wear on consumables like tyres or fluids, the suspension ball joints are critical components that can degrade regardless of mileage, especially if subjected to repeated stress cycles or poor alignment. The absence of significant mileage gaps does not necessarily mitigate the risk of suspension failure, as the 2026 test highlights a clear pattern of wear that may have developed over time. Rapid mileage accumulation could also indicate higher operational demands, which might accelerate wear on other components such as brakes, drivetrain seals, or electrical systems, though the EQC’s electric powertrain is generally less prone to such wear compared to internal combustion engines. Given the recurring suspension ball joint failures, the prospective buyer should prioritise a thorough inspection of the front suspension assembly, focusing on the lower control arms, ball joints, and associated bushings. During a test drive, listen for unusual clunking or rattling noises from the front suspension when cornering, braking, or accelerating, as these can indicate loose or failing components. Visually inspect the suspension for signs of excessive play in the steering wheel or wheel alignment, and check for uneven tyre wear patterns that may suggest misalignment or suspension issues. The buyer should also verify that the ball joints are not leaking grease or exhibiting signs of excessive wear, such as a rough steering feel or a noticeable increase in steering effort. Immediate replacement of the worn ball joints is strongly advised, as delaying this could lead to further damage to the suspension bushings, control arms, or even the vehicle’s structural integrity if the failure progresses. For the remaining components, the buyer should conduct a comprehensive physical inspection of the vehicle’s condition. Given the vehicle’s age and the recorded mileage, the tyres should be checked for sidewall cracking or perishing, which can occur even with moderate usage over time. The brake system should be inspected for signs of corrosion on the discs or binding calipers, particularly if the vehicle has been left stationary for extended periods, as standing corrosion can lead to reduced braking performance or even failure. The battery and electrical systems should be assessed for signs of degradation, such as a slow crank or unusual electrical whining noises, as the EQC’s high-voltage components may require more frequent attention than a conventional internal combustion engine. Additionally, the buyer should verify that the vehicle’s service history includes regular fluid servicing, particularly for the electric motor oil and transmission fluid, as these should be replaced according to the manufacturer’s recommendations to prevent long-term damage. Finally, a professional inspection of the exhaust emissions system and catalytic converter efficiency is advisable, given the vehicle’s age and the potential for emissions-related wear in electric vehicles, though the EQC’s emissions compliance is generally robust.