2015 Mercedes-Benz S-Class 3.0L Diesel · FN65 NFJ

The most recent MOT test for this 2015 Mercedes-Benz S-Class was conducted on 2025-11-10 and resulted in a clean pass, with no defects or advisories recorded. This follows a consistent pattern of passing MOTs from 2022 through 2025, indicating a stable maintenance record with no recurring failures or persistent issues. The absence of repeated failures suggests the vehicle has been well-maintained to date, though the presence of an advisory in 2022—specifically regarding offside rear tyre wear and headlamp aim—demonstrates that some wear and minor adjustments were addressed then. The fact that these issues were resolved by the next MOT implies proactive attention to critical components, reinforcing the vehicle’s overall roadworthiness and reliability over the past three years. The recorded mileage of 32,766 miles for a vehicle aged approximately 11 years is notably low, averaging around 2,979 miles per year—a rate that is significantly below the typical usage levels for a luxury sedan of this class. Such low mileage can stem from infrequent use, long periods of storage, or a more leisurely driving profile, which may have contributed to reduced wear on consumables, suspension, and drivetrain components. However, low mileage does not automatically absolve the vehicle from potential issues arising from prolonged inactivity, such as standing corrosion in brake systems, fluid degradation over time, or tyre sidewall perishing due to exposure to environmental elements. The disparity between recorded mileage and age also warrants consideration for any hidden wear that might not be reflected in the odometer, particularly in high-stress areas like the drivetrain, exhaust system, or suspension components. To proceed with a thorough physical inspection, the prospective buyer should prioritise checks that address both mileage-related wear and the potential effects of prolonged inactivity. First and foremost, the tyres should be examined for signs of sidewall perishing, which can occur even at low mileage if the vehicle has been stored for extended periods without rotation or rotation checks. The offside rear tyre from the 2022 MOT advisory should be closely inspected for uneven wear patterns, which could indicate alignment or suspension issues; a test drive should include checking for lateral clunking or pulling sensations that might suggest misalignment or worn suspension bushes. Additionally, the brake system should be scrutinised for signs of standing corrosion on brake discs or binding calipers, which can develop if the vehicle has been stationary for long periods without braking activity. The battery should be tested for voltage output and overall health, as low usage can lead to sulphation or terminal corrosion, compromising reliability. For fluid servicing, the buyer should verify the calendar-based intervals for the engine oil, differential fluid, and brake fluid, as these can degrade over time regardless of mileage. The coolant system should be checked for leaks or signs of overheating, which could indicate a failing water pump or radiator issue, particularly if the vehicle has been left unused for significant durations. The exhaust emissions system should be inspected for leaks or corrosion, as these can affect both performance and compliance with emissions standards. Lastly, the vehicle’s service history should be reviewed to confirm that all scheduled maintenance—such as timing belt replacement (if applicable), suspension component servicing, and fluid top-ups—has been recorded. If any discrepancies are found, further investigation into the vehicle’s maintenance records or a professional inspection may be warranted to ensure the vehicle’s long-term reliability.