2004 MERCEDES-BENZ SLK3.5L Petrol

The 2004 Mercedes SLK presents a stable and improving maintenance picture. The most recent test on 8 July 2025 at 63,633 miles passed cleanly with zero defects, a significant turnaround from the failure recorded exactly two years prior. The 2023 failure at 61,359 miles flagged a seriously weakened front brake disc and an excessively corroded offside front brake pipe, both of which were rectified before the retest on the same day. That the car has since passed two consecutive annual tests without any advisories indicates the previous owner addressed the corrosion and braking issues properly rather than applying a temporary fix. The mileage profile tells a consistent story of very light use. At roughly 2,892 miles per year over 22 years, this SLK has covered just 1,105 miles in the last twelve months, down from 1,169 miles in the prior year. The annual test dates cluster tightly around early July each year, suggesting a single long-term keeper or a careful owner who maintains a regular testing cycle. There are no alarming gaps or sudden jumps in the odometer readings that would hint at a rolled-back clock or extended periods of neglect. Despite the clean recent record, a buyer should still examine the underside carefully. The 2023 failure specifically cited a corroded brake pipe, and under trays were noted as fitted at every test since 2022. Under trays trap moisture and road salt, meaning corrosion could be developing unseen on brake lines, subframe mounting points, and suspension components. The rear brake disc advisory from the same year, while not serious, hints at a car that sits more than it drives. Long periods standing can cause localised pitting on discs and calliper seals to stick. A practical inspection should focus on the condition of all flexible brake hoses, the metal brake lines along the floorpan, and the integrity of the subframe and inner wing seams. Tyre age also warrants attention. The 2022 pass recorded cracking and perishing on both front tyres, and with such low annual mileage the current set could be aged rather than worn. Any tyre older than six years should be replaced regardless of remaining tread. The engine and under trays must be removed to properly assess the structural condition they have been concealing.