1990 Mercedes-Benz S-Class 5.0L Petrol · H949 AML

The vehicle currently presents a stable maintenance profile, with the most recent MOT passed on 2 August 2025 at 163,722 miles showing no defects. This follows a period of minor mechanical fluctuations, such as the binding front service brakes noted in the January 2024 test at 163,595 miles. While the vehicle has encountered various issues over the last decade, the absence of advisories or failures in the most recent inspection suggests that previous mechanical concerns have been addressed and the car is currently in a roadworthy state. The mileage pattern indicates very light usage for a 36-year-old vehicle, averaging approximately 4,548 miles per year. The data shows significant periods of low activity, with the mileage only increasing by 127 miles between the January 2024 and August 2025 tests. Such low annual mileage can be beneficial for reducing drivetrain wear, but it often implies the vehicle sits stationary for extended periods. This pattern can lead to the deterioration of rubber components and the onset of fluid-related issues, which is reflected in the historical record. A prospective buyer should focus inspections on the braking system and potential fluid leaks. The record shows recurring issues with brake pads and binding calipers, specifically in 2013, 2017, and early 2024. Although the 2025 test was clean, the history of binding brakes and thin pads warrants a thorough check of the calipers and hydraulic lines. The 2014 test also flagged a defective gearbox mounting and a leaking prop shaft oil seal, alongside early signs of corrosion on the nearside front chassis leg. Given the age of the vehicle and the low usage, the integrity of the chassis and the condition of the suspension bushes and seals should be verified to ensure no new corrosion or leaks have developed during periods of inactivity. The engine's combustion health also requires scrutiny. The 2015 and 2016 tests recorded both black and blue smoke during acceleration, indicating potential issues with fuel mixture or oil consumption. While the recent tests show no exhaust emission failures, the previous instances of blue smoke suggest the engine may have been prone to oil bypass or valve stem seal wear. A physical inspection of the engine bay for fresh oil seepage and a clear exhaust observation during a test drive are necessary to confirm these historical issues remain resolved.