2000 Mercedes-Benz S-Class 5.0L Petrol · W485 ALA

A long-term trend of clean MOT certificates has recently been interrupted by systemic brake disc degradation and evidence of body corrosion. While the vehicle passed its latest inspection on 8 April 2024, the record now shows all four brake discs are worn, pitted, or scored. This follows a 2021 advisory regarding corrosion on the offside rear arch, indicating that while the vehicle has historically avoided major failures, surface deterioration is now becoming apparent. The recorded mileage of 108,620 miles is low for a twenty-six-year-old vehicle, averaging approximately 4,178 miles per year. This low annual accumulation suggests the vehicle has spent significant periods stationary or has been used sparingly. Mechanically, such a usage profile often contributes to the pitting and scoring of brake discs observed in the latest test, as components are more susceptible to surface oxidation when not regularly cycled through heat and friction. Attention must be paid to the braking system during a physical inspection and test drive. The simultaneous flagging of all four discs as pitted or scored suggests a need for comprehensive replacement of the discs and pads. During the test drive, feel for any pedal judder or pulsations under braking, which are common symptoms of scored or warped discs. Ensure there is no unevenness in braking force or steering pull when decelerating from speed. A thorough examination of the bodywork is required, specifically focusing on the offside rear arch where corrosion was previously noted. It is necessary to determine if this rust has remained superficial or if it has progressed into the structural integrity of the wing. Additionally, check the condition of the windscreen wiper blades, as the offside front was recorded as defective during the last test.