2017 Mercedes-Benz S-Class 4.7L Petrol · 1 RGJ

The most recent MOT inspection conducted in February 2026 resulted in a pass, but the vehicle is showing clear signs of approaching a period of significant maintenance expenditure. While the test was successful, the presence of advisories regarding thinning rear brake pads and pitted or scored front inner brake discs indicates a worsening trend in braking component wear compared to the previous year. The history shows a recurring pattern of brake-related advisories, suggesting that while the vehicle is being maintained sufficiently to pass inspections, the consumables are reaching the end of their service life. This transition from minor advisories in 2024 to more specific wear warnings in 2026 suggests that the braking system requires proactive attention to prevent future failures or diminished stopping performance. With a recorded mileage of 40,648 over approximately nine years, this Mercedes-Benz S-Class has been driven at an exceptionally low rate of roughly 4,500 miles per annum. While low mileage is often viewed as a benefit, such infrequent usage for a high-performance luxury saloon carries specific mechanical risks. Vehicles that spend long periods stationary are prone to various forms of degradation that are not strictly mileage-dependent. You should be particularly mindful of the effects of standing, as low usage can lead to moisture accumulation in fluids, the development of surface corrosion on brake discs, and the potential for seals and rubber components to perish or become brittle due to lack of regular thermal cycling and lubrication. During your test drive, you must pay close attention to the braking system and front-end stability. Given the advisories for pitted and scored front discs alongside thinning rear pads, listen for any grinding noises or metallic squealing when applying the brakes. You should also feel for any brake shudder or pulsation through the pedal, which would indicate warped or unevenly worn discs. The history also noted play in the front suspension arm ball joints in 2024; although not re-noted in the latest test, you should listen for any clunks or knocks when turning the steering wheel at low speeds or driving over uneven surfaces, as worn ball joints can compromise steering precision and safety. Because this vehicle has been used sparingly, a thorough physical inspection of the rubber components is essential. Check the sidewalls of all tyres for any signs of perishing, cracking, or age-related degradation, as tyres can become unsafe due to ozone cracking even if they have significant tread depth remaining. Inspect the underside of the vehicle for signs of corrosion on the exhaust system and suspension components, which can occur when a car is not driven frequently enough to keep components dry. Finally, verify the service history to ensure that oil, coolant, and brake fluid changes have been performed on a calendar basis rather than solely based on mileage, as these fluids degrade over time regardless of distance travelled.