2014 Mercedes-Benz E 2.1L Electric diesel · WM64 AAM

The latest MOT test on the 2014 Mercedes-Benz E conducted on 2025-07-22 resulted in a pass, though it included two persistent advisories: the front-to-rear brake pipes exhibited significant corrosion, covered in grease or other contaminants, which is a critical failure point under DVSA criteria. Additionally, there was a minor failure noted for the brake pedal not releasing fully when the parking brake is engaged, indicating a potential mechanical binding issue within the parking brake mechanism. The previous MOTs in 2024 and 2023 also recorded advisories related to brake pipe corrosion, suggesting this is a recurring problem rather than a one-off anomaly. The absence of failures in the earlier MOTs in 2022 and 2023 indicates a stable maintenance trend for other systems, but the brake-related advisories warrant immediate attention. The vehicle’s overall roadworthiness is compromised by these advisories, which could lead to a failure if not addressed, particularly given the high mileage and potential for further corrosion progression. The recorded mileage of 151,538 miles for a vehicle aged approximately 12 years represents a notably high annual usage rate of around 12,628 miles per year. This level of mileage is unusual for a vehicle of this age, especially if it has been in regular service, as it suggests either aggressive driving habits, frequent short trips, or periods of prolonged use without adequate maintenance breaks. High mileage accelerates wear on consumables such as brake pads, suspension components, and drivetrain elements like the transmission and exhaust system. The brake pipes, in particular, are highly susceptible to corrosion from moisture ingress and road salt exposure, which is exacerbated by frequent driving. Additionally, the rapid accumulation of mileage may indicate that the vehicle has been subjected to more stress than a lower-mileage equivalent, potentially leading to premature failure of suspension bushes, seals, or other wear items that are not immediately visible but could degrade over time. Given the recurring advisories related to brake pipe corrosion and the binding parking brake, the prospective buyer should prioritise a thorough inspection of the braking system. The corroded brake pipes should be visually inspected for any signs of cracks or leaks, and the entire system should be flushed and replaced if necessary to prevent catastrophic failure. During a test drive, listen for any unusual noises from the brakes, such as grinding or squealing, which could indicate worn pads or warped discs. Also, check for a spongy or uneven pedal response, which may signal air in the brake lines or internal brake component failure. The parking brake should be engaged and released smoothly without excessive effort or binding; if it is still problematic, the parking brake mechanism should be serviced or replaced. Beyond the brakes, the buyer should also verify that the vehicle has been serviced according to the manufacturer’s schedule, particularly focusing on fluid changes—brake fluid, coolant, and transmission fluid—all of which degrade over time and can affect performance and safety. For the broader vehicle assessment, given the high mileage and the age of the Mercedes-Benz E, the buyer should conduct a series of targeted checks to ensure the vehicle remains safe and reliable. Start with a visual inspection of the tyres for signs of perishing, such as cracking or dry rot in the sidewall, which can compromise their structural integrity. Check the tyre tread depth for uniformity and signs of uneven wear, which may indicate suspension or alignment issues. The vehicle’s battery should be tested for voltage and cleanliness, as standing corrosion or a failing battery can lead to electrical gremlins or poor starting. The suspension should be inspected for any signs of worn or damaged components, such as broken coil springs, seized control arm bushings, or cracked strut mounts, which can lead to clunking noises or poor ride quality. Finally, the exhaust system should be checked for leaks or excessive noise, as high mileage can lead to rusted or damaged components that may affect emissions or safety. If the vehicle has been in storage for extended periods, it is also advisable to run it through a diagnostic test to ensure all electrical systems, including the immobiliser and anti-theft system, are functioning correctly. Given the advisories, a professional inspection by a qualified Mercedes-Benz specialist is strongly recommended to address the brake pipe and parking brake issues before proceeding with purchase.