2016 Mercedes-Benz S-Class 3.0L Diesel · M111 AAJ

The most recent MOT test conducted in April 2025 resulted in a pass with no recorded defects or advisories. Looking at the history from 2022 through to 2025, the maintenance trend appears exceptionally stable, showing a consistent ability to meet all regulatory safety and environmental standards without any recorded failures. The complete absence of advisories regarding common wear items like brake pads, tyres, or suspension components suggests that the vehicle has either been maintained to an exemplary standard or has been subjected to very minimal mechanical stress. With a recorded mileage of 49,735 miles over a ten-year period, the vehicle has averaged approximately 4,974 miles per year. This is significantly lower than the typical annual mileage for a premium executive saloon of this class. While low mileage is often viewed as a positive attribute due to reduced wear on the engine, transmission, and drivetrain, it necessitates a more nuanced inspection. Low-usage vehicles are prone to specific issues stemming from infrequent operation, such as the stagnation of lubricants and the degradation of rubber-based components that do not benefit from regular thermal cycling and movement. Because the MOT record is clean and suggests infrequent use, your physical inspection should focus on age-related degradation rather than mileage-induced wear. Closely examine the tyres for any signs of sidewall cracking or perishing, as older rubber can lose its structural integrity and grip even if the tread depth remains high. Check the brake discs for significant surface corrosion or pitting, which can occur when a vehicle sits for extended periods, and listen for any signs of binding calipers or uneven braking during your test drive. It is also essential to verify that time-based servicing has been carried out; ensure that fluids such as brake fluid, coolant, and engine oil have been changed according to the manufacturer's time intervals rather than solely based on mileage. Finally, pay particular attention to the condition of the 12V battery and the integrity of various rubber components, including suspension bushes and engine mounts, which can harden and crack over time. If this S-Class is equipped with air suspension, listen carefully for any unusual compressor noise or signs of the vehicle sagging after being parked, as these can indicate leaks in the air bellows or system components. Verifying the service book for consistent stamps will be crucial to confirm that the vehicle has not merely been sitting idle, but has been proactively maintained to prevent the chemical degradation of vital fluids and seals.