2015 Mercedes-Benz E 3.0L Diesel · PH11 THR

The most recent MOT test on 2025-09-03 resulted in a clean pass, marking a return to full compliance after a series of failures and advisories in 2024. The vehicle’s maintenance history over the past five years demonstrates a pattern of recurring wear-related issues, particularly concerning the front brake system, which failed in 2024 with critical pad thickness below the legal minimum and significant disc wear. While the 2023 and earlier MOTs were free of defects, the 2024 failures suggest either aggressive driving, prolonged standing with brake bind, or inadequate maintenance of the braking components. The advisories on rear inner brake pads in 2024 imply ongoing friction system degradation, which could escalate if not addressed promptly, potentially leading to further MOT failures or compromised stopping performance. The vehicle’s recorded mileage of 142,690 miles at 11 years old represents a high annual usage rate of approximately 12,972 miles per year, which is notably elevated for its age. Such mileage accumulation typically accelerates wear on consumables like brake pads, tyres, suspension components, and drivetrain elements, especially if the vehicle has been subjected to frequent stops, harsh braking, or prolonged periods of inactivity with standing corrosion. The significant gap between the 2024 failure and the 2025 pass suggests either a period of reduced use or a targeted maintenance intervention, but the high mileage alone warrants careful scrutiny of the braking system, suspension, and tyre condition to mitigate further deterioration. As a prospective buyer, your immediate inspection should focus on the front brake system, given the 2024 MOT failures. Visually inspect the front brake discs for signs of warping, scoring, or excessive glazing, and listen for any unusual grinding or squealing during a test drive, particularly when applying the brakes. Check the brake fluid level and condition in the reservoir—low or discoloured fluid may indicate contamination or leakage from the brake master cylinder or calipers. The offside and nearside front brake pads must be replaced to meet the legal minimum thickness of 1.5 mm; failure to do so could result in a repeat MOT failure or compromised braking efficiency. Additionally, the rear inner brake pads are showing signs of wear, so consider a full brake system inspection, including the condition of the rear discs and linings, to prevent further degradation. Beyond the brakes, examine the tyres for uneven wear patterns, which could indicate misalignment, suspension issues, or incorrect tyre pressure. The 2019 advisory on nearside tyre damage or cracking suggests the vehicle may have been subjected to impact damage or prolonged exposure to adverse conditions, leading to sidewall perishing. Check for cracks, bulges, or tread depth below 1.6 mm, as these can compromise tyre integrity and safety. Given the high mileage, also inspect the suspension for signs of wear, such as stiffening of coil springs, clunking from worn suspension bushes, or binding in control arms or struts. Lastly, verify the fluid levels and condition of the coolant, brake fluid, and differential/transmission fluids, as these degrade over time and can lead to catastrophic failures if neglected. If the vehicle has been stored for extended periods, pay particular attention to corrosion on the undercarriage, wheel bearings, and standing components, as standing water and moisture accelerate rust formation.