2018 Mercedes-Benz S-Class 2.9L Diesel · A29 BBO

The 2018 Mercedes-Benz S-Class presents a stable and improving maintenance trend, evidenced by a completely clean MOT record. The most recent test on 18 August 2025 at 102,431 miles passed without a single defect or advisory, mirroring the outcome of the preceding test on 15 January 2025 at 101,984 miles. This consistent absence of flagged issues indicates the vehicle currently meets all required safety and environmental standards, reflecting diligent upkeep rather than deferred maintenance. Despite the spotless test history, the mileage accumulation warrants scrutiny. Covering roughly 12,804 miles annually, this S-Class sits above the national average for its age. Between the 24 January 2024 test at 86,810 miles and the 13 August 2024 test at 92,917 miles, the car covered 6,107 miles in just over six months. The pace slowed slightly thereafter, with only 447 miles recorded between January and August 2025. This recent drop in usage could indicate a change in ownership or driving habits, though the high overall mileage confirms sustained, heavy use over its lifespan. While the MOT record shows no recurring mechanical faults, the elevated mileage demands a physical inspection of high-wear components. A buyer should closely examine the condition of the suspension bushes and coil springs, as high-mileage luxury saloons often suffer from premature wear in these areas despite passing static MOT checks. Brake disc thickness and caliper operation require verification, alongside a thorough underbody inspection for corrosion or structural compromise. Although exhaust emissions have consistently passed, the drivetrain and transmission fluid condition should be assessed, as these high-torque components endure significant stress over 100,000 miles.