2016 Mercedes-Benz S-Class 3.0L Diesel · WN66 HVH

The vehicle is currently roadworthy following a pass on July 8, 2026, at 215,455 miles. However, the maintenance trend shows a significant and concerning decline in preventative care. A catastrophic failure just ten days prior on June 29, 2026, revealed a laundry list of defects, including eleven separate failures across mechanical, electrical, and safety systems. While the car passed the subsequent test, the volume of faults recorded in that single session suggests a reactive approach to repairs rather than a proactive maintenance schedule. The mileage profile is exceptionally high for a ten-year-old vehicle, averaging over 21,500 miles per year. There is a notable surge in usage between August 2025 and June 2026, where the car covered 20,312 miles in just eleven months. This rapid accumulation puts immense strain on the S-Class's complex drivetrain and air suspension components. The gap between the 2022 and 2024 tests shows a period of lower use, but the current trend indicates high-intensity, long-distance motorway operation. A buyer must conduct a thorough inspection of the front suspension, as the nearside lower control arm ball joint was flagged as excessively worn in both 2019 and 2026. The June 2026 failure also highlighted thin rear brake pads and a damaged light unit, indicating that consumable items are ignored until they reach failure point. The presence of an inoperative engine MIL and a supplementary restraint system (SRS) fault in the recent failure record is particularly critical; these electrical faults must be verified as fully rectified to ensure underlying sensor issues were not merely cleared to pass the MOT.