2012 Mercedes-Benz E 3.0L Diesel · KN62 FWZ

The most recent MOT test on 2026-09-01 reveals the vehicle passed without any recorded defects, though the prior year’s test in 2025 was not documented, leaving a gap in the maintenance history. The overall trend over the last decade is mixed, with a notable failure in 2021 due to severe corrosion on both rear brake pipes, which required immediate rectification to prevent brake fluid leakage and potential system failure. Subsequent MOTs have shown recurring advisories on rear brake pipe corrosion, particularly on the offside, which suggests a persistent issue likely stemming from environmental exposure, such as road salt or moisture ingress, particularly in colder months. The front brake system also exhibits wear advisories, with discs and pads nearing the legal limits, indicating ongoing friction system degradation that warrants closer attention to avoid premature replacement costs. The vehicle’s recorded mileage of 123,201 miles at 14 years old represents a moderate annual usage rate of approximately 8,787 miles per year, which is within the expected range for a car of this age and class. However, the consistent mileage accumulation over the years suggests that the vehicle has been subjected to regular driving conditions rather than prolonged periods of inactivity. This pattern may accelerate wear on consumables like brake pads, tyres, and suspension components, as well as potential stress on drivetrain and exhaust systems due to sustained load. The absence of significant mileage gaps does not necessarily mitigate the risk of hidden issues, particularly in components prone to corrosion or fluid degradation, such as brake hoses and seals, which can fail without obvious warning. For the prospective buyer, the most critical areas to inspect during a physical examination are the rear brake system, given the historical corrosion failures. Check for any signs of fluid leakage around the brake pipes, particularly near the rear wheels, and listen for an unusual hissing sound when applying the brakes, which could indicate a compromised seal. Visually inspect the brake discs and pads for uneven wear or glazing, and test the brake pedal feel for firmness or excessive travel, which may signal worn pads or a failing master cylinder. The front brake discs, already showing advisories, should be closely examined for warping or excessive thickness reduction, as this can lead to reduced braking performance and increased heat buildup. Additionally, verify that the under trays are correctly fitted to prevent debris from entering critical components like the exhaust manifold or suspension linkages. Beyond the mechanical checks, the vehicle’s age and usage profile necessitate a thorough review of fluid condition and structural integrity. Given the 14-year age, the engine oil and coolant should be fresh, with no signs of sludge or contamination, as old fluids degrade performance and can lead to catastrophic failure. The 12V battery should be tested for voltage output and overall health, as standing vehicles can suffer from sulphation or weak alternator regulation. Tyres should be checked for sidewall perishing, which is common in older vehicles due to ozone exposure, and ensure the tread depth meets legal standards, even if the mileage suggests they have been recently replaced. Finally, a visual inspection of the exhaust system for rust or structural damage, particularly around the catalytic converter and muffler, is essential, as corrosion can compromise emissions control and structural integrity. If possible, a professional inspection of the drivetrain and suspension components, focusing on the rear axle and suspension bushings, would be prudent to confirm the absence of hidden wear or damage.