2017 Mercedes-Benz S-Class 6.0L Petrol · REH 4N

The most recent MOT test on 2026-01-06 was passed with no recorded defects, marking a positive turnaround following a failure in 2024-01-05. While the vehicle has experienced a pattern of advisories related to rear brake components—particularly thin brake pads and worn discs—these have not progressed to critical failure points in the last two MOT cycles. The earlier failure highlighted a dangerous condition with exposed tyre cords, which would have rendered the car unsafe for road use, but this issue appears to have been resolved. The overall maintenance trend is stable, with no evidence of deteriorating structural integrity or major mechanical failures, though the recurring brake advisories suggest routine attention is required to prevent further wear or potential failure. The recorded mileage of 55,583 miles for a nine-year-old Mercedes-Benz S-Class reflects a moderate annual usage rate of approximately 6,176 miles per year, which is within the expected range for this vehicle class. Such mileage accumulation typically indicates regular, moderate use rather than light or heavy driving conditions. However, the presence of advisories related to tyre wear—including edge wear and near-legal limits—points to either aggressive cornering, uneven load distribution, or potential suspension misalignment. The gaps in MOT testing, particularly the two-year interval between 2022 and 2024, may have allowed wear to progress subtly, so a thorough inspection of the suspension and alignment systems would be prudent to confirm whether these issues stem from prolonged standing or active driving stresses. For a prospective buyer, the most critical immediate checks should focus on the braking system, given the recurring advisories. During a test drive, listen for uneven brake pedal response, excessive vibration or shuddering when applying the brakes, or any signs of brake fluid contamination or overheating. Inspect the rear brake discs for warping, scoring, or excessive glazing, and verify that the pads are evenly worn without seizing or sticking. If the discs are significantly pitted or corroded, this could indicate prolonged standing or moisture exposure, increasing the risk of brake failure. Additionally, examine the tyre tread depth on all four tyres, ensuring no further edge wear or cord exposure is present, and check for uneven wear patterns that may signal suspension or alignment issues. Beyond the brakes, the tyre history from the MOT records suggests the vehicle has undergone some degree of wear-related stress, so a visual inspection of the sidewall condition is essential. Tyres aged nine years without significant mileage accumulation may show signs of perishing, cracking, or dry rot, particularly around the shoulders and edges, which can compromise structural integrity. Also, verify the vehicle’s registration plates for compliance with current standards, as the 2022 MOT failure highlighted non-conformity issues. For fluid systems, given the vehicle’s age, check the condition of the engine oil, coolant, and brake fluid for signs of degradation or contamination, as these fluids can degrade over time even with minimal use. Finally, assess the 12V battery health, as prolonged standing or infrequent use can lead to sulphation or reduced capacity, which may require replacement before the battery fails completely. A comprehensive inspection of the exhaust system for leaks, corrosion, or structural damage is also advisable, given the S-Class’s exposure to road debris and environmental elements.