2015 Mercedes-Benz S-Class 3.0L Diesel · K1 ESU

This Mercedes-Benz S-Class has demonstrated a consistent roadworthiness record over its most recent MOT cycles, with no defects recorded in the April 2025 test at 121,568 miles. The absence of advisories or failures across all four tests—spanning November 2021 to April 2025—indicates that the vehicle has not experienced recurring mechanical issues that would warrant concern. However, the most recent MOT was conducted nearly 15 months ago, which is beyond the standard 12-month interval. While this does not inherently signal neglect, it does mean the vehicle has not undergone a recent professional inspection to verify the condition of critical components such as suspension alignment, brake hydraulic integrity, or exhaust system leaks. The lack of advisories in prior tests suggests previous owners may have addressed minor wear privately, but this does not preclude the development of latent issues over time. The mileage progression of approximately 11,052 miles annually aligns with typical usage patterns for a luxury vehicle of this age, without any abrupt spikes or prolonged periods of inactivity. The most notable interval is between the November 2022 and November 2023 tests, where the vehicle accumulated 7,945 miles in just over a year—a rate consistent with regular use rather than aggressive driving. There are no red flags in the mileage pattern to suggest excessive wear on high-stress components, though the absence of intermediate servicing records means the buyer cannot rely on the dealer’s maintenance history for pre-MOT upkeep. The steady accumulation implies the vehicle has likely been driven rather than stored, which generally reduces the risk of fluid degradation or suspension stiffening from prolonged immobility. Given the clean MOT history, a buyer should prioritise a thorough inspection of the suspension system, particularly the coil springs, bushes, and shock absorbers, as these components in an 11-year-old luxury vehicle are prone to fatigue or corrosion. The brakes, including calipers, pads, and discs, should be checked for uneven wear or binding, especially if the vehicle has been driven in mixed conditions. The exhaust system warrants scrutiny for leaks or rust penetration, particularly around flanges and joints, as emissions-related failures are common in older Mercedes models. Structural integrity of the chassis and underbody should also be assessed for corrosion, particularly in areas prone to salt damage if the vehicle has been driven in northern or coastal regions. While the MOT record provides reassurance, a pre-purchase inspection by a specialist is strongly advised to verify the condition of less accessible components such as the drivetrain, electrical systems, and interior wear.