2004 Mercedes-Benz S-Class 3.2L Diesel · DU54 BXK

This 2004 Mercedes-Benz S-Class presents a consistent pattern of recurring minor defects and advisories across its recent MOT history, indicating a vehicle that regularly passes its inspections but carries ongoing age-related wear. The most recent test on 28th February 2026 resulted in a pass, yet it continued to flag the long-standing minor defects of slightly defective nearside and offside headlamp lenses, and a damaged windscreen not adversely affecting the driver's view. Furthermore, advisories for slight free play in the steering rack and worn front brake discs were noted, both of which have been persistent concerns in previous examinations, suggesting these are developing or unaddressed issues. The vehicle has generally passed its MOTs after initial failures for relatively minor items like an inoperative registration plate lamp or insufficient windscreen washer fluid, but the underlying trend points to a vehicle requiring diligent attention to its accumulating wear. With a recorded mileage of 320,289 miles over approximately 22 years, this vehicle has seen extensive use, averaging around 14,559 miles per year. This high mileage profile suggests that the engine, transmission, and all major mechanical systems have accumulated significant operational hours and cycles. While consistent high mileage can sometimes indicate regular use and maintenance, it inherently places greater stress and wear on consumable components such as suspension bushes, wheel bearings, braking systems, and the overall drivetrain. The consistent annual MOT testing confirms continuous road use, but the recurring advisories highlight the ongoing battle against wear and tear on a vehicle of this age and mileage. Prospective buyers should pay particular attention to the steering system. The repeated advisory for slight free play detected at the steering wheel, present in both 2024 and 2026, indicates a potential developing issue with the steering rack or associated linkages. During a test drive, listen for any knocking or clunking noises when turning the wheel or driving over uneven surfaces, and assess for any excessive looseness or vagueness in the steering response. This component is critical for vehicle control and can be costly to rectify if it deteriorates further. Furthermore, the advisories for worn brake discs (front and rear) and thin brake pads across various tests suggest the braking system requires close inspection. Check for any pulsing or judder through the brake pedal during deceleration, which could indicate warped discs, and listen for squealing noises. A thorough visual inspection of the brake discs for scoring and the pads for remaining friction material is advisable. The "surface corrosion throughout under side" advisory from March 2023 is a significant concern for an older Mercedes-Benz; a detailed inspection of the vehicle's underbody, including structural components, subframes, brake lines, and fuel lines, is essential to assess the extent of any corrosion and its potential impact on structural integrity. The recurring minor defects with the headlamp lenses should also be checked for clarity and impact on light output.