2004 Mercedes S-Class 3.7L Petrol · KN54 PLF

The 2004 Mercedes S-Class presents a stable and favourable roadworthiness trend. The most recent test on 8 May 2025 at 83,524 miles returned a pass with no defects recorded, continuing an unbroken sequence of clean results since 2022. The maintenance history shows no recurring advisories or mechanical faults, indicating the vehicle has been kept to a standard that satisfies annual statutory inspection without intervention. Recorded mileage sits at 83,524 against an age of around 22 years, equating to roughly 3,800 miles per year. The DVSA entries show gentle accumulation: 79,184 miles on 17 May 2022, 79,970 in May 2023, 81,051 in May 2024, and 83,524 in May 2025. A single anomaly appears on 17 May 2022 where the car failed and passed on the same day at identical mileage with no defects listed, pointing to an administrative or process retry rather than a mechanical defect. Low annual use of this order often means long stationary periods, which can hide intermittent corrosion or flat-spotting on tyres not captured in a pass result. A buyer should still commission an in-person inspection of structural integrity and underbody corrosion, as the S-Class of this era is prone to subframe and suspension arm rust where the car has stood unused. The brake discs, calipers, and flexible hoses deserve physical checks for seizing after low-mileage dormancy, despite no tester flags. Suspension bushes and coil springs should be examined for perishing from age rather than wear. Given the clean MOT lineage and modest yearly distance, previous keepers appear to have handled basic upkeep competently. The absence of advisories across four years suggests no neglected consumables, though the 2022 dual entry warrants a glance at the V5C to confirm no genuine rejection occurred.