2005 Mercedes-Benz SL 3.7L Petrol · KJ55 FVE

The 2005 Mercedes SL presents a broadly stable maintenance picture, with the most recent MOT conducted on 16 July 2025 at 66,546 miles returning a clean pass and zero defects. This marks a notable improvement over the preceding 12 months, during which the vehicle failed its June 2024 test on three separate items before passing the following day. The rectification of those defects, combined with a subsequent advisory-free pass, suggests the previous owner addressed the flagged issues promptly rather than allowing them to persist. The maintenance trend is therefore best described as resolving, with no outstanding advisories or recurring faults currently recorded. The mileage profile is unusually low for a vehicle of this age. Covering just 4,392 miles between August 2021 and July 2025, and only 673 miles in the 12 months leading up to the June 2024 test, the car has clearly seen extended periods of very light use or standing. Annual accumulation of roughly 3,169 miles is well below the UK average. This low mileage can benefit certain components by reducing wear, yet prolonged inactivity carries its own risks, particularly for perishable items such as rubber seals, tyres, brake fluid, and suspension bushes that deteriorate with age regardless of use. The 2024 failure and the 2023 advisory both centred on the braking system, specifically rear brake disc wear and thin rear pads. Although these were rectified in time for the 2024 pass, a buyer should still inspect the rear braking components in person. Check the condition of the rear discs for scoring or lipping, measure remaining pad thickness, and assess whether the rear calipers are operating freely without binding. The presence of a nail in the offside front tyre during the 2024 failure also warrants a close inspection of all four tyres for age-related sidewall cracking, uneven tread damage, or embedded punctures, given the car's tendency to cover very short distances. Beyond the brakes, the low-mileage, long-term standing pattern means a buyer should pay particular attention to the underside for structural corrosion, especially around suspension mounting points, sills, and subframes. Inspect all rubber suspension bushes, dust boots, and gaiters for perishing or splits. Check the condition and age of the tyres against their DOT date codes, and verify that the exhaust system, fuel lines, and flexible hoses have not deteriorated through age rather than mileage. A short test drive should confirm smooth gear changes, no suspension knocks over bumps, and that the braking system pulls evenly without pulling or juddering.