2004 Mercedes-Benz SLK 2.3L Petrol · PA04 HKN

The 2004 Mercedes-Benz SLK presents a stable and improving maintenance trend, culminating in a completely clean pass on 31 May 2025 at 57,020 miles. The most recent test recorded zero defects, indicating the vehicle currently meets all required roadworthiness standards. While the 2024 and 2023 tests show failures on 17 June 2024 and 19 June 2023, these were immediately rectified, with clean passes recorded on 24 June 2024 and 20 June 2023 respectively. The absence of recorded defects on those failure entries suggests the issues were likely minor or administrative, such as an aborted test or a retest scenario, rather than significant mechanical failures. The consistent clean passes since then demonstrate diligent upkeep. At roughly 22 years old with 57,020 miles, this SLK averages approximately 2,592 miles per year, which is exceptionally low for its age. The mileage accumulation reveals a distinct pattern of light use. Between the June 2023 test at 47,318 miles and the June 2024 test at 53,403 miles, the car covered 6,085 miles over twelve months. However, from June 2024 to the May 2025 test at 57,020 miles, the mileage increased by only 3,617 miles. This tapering of annual mileage suggests the vehicle has spent extended periods stationary. Prolonged standing can cause its own issues, such as perished rubber seals, flat-spotted tyres, and corroded brake discs, despite the low overall mileage. Although the MOT record is entirely free of mechanical advisories, the low-mileage usage pattern demands a careful physical inspection. Buyers should thoroughly examine the condition of the tyres, checking for sidewall cracking and date codes, as older rubber degrades regardless of tread depth. The braking system requires close scrutiny; infrequent use often leads to surface corrosion on the brake discs and binding calipers, even if they passed the recent roller test. Suspension bushes and coil springs should be inspected for deterioration from age rather than wear. Finally, the underbody and structural points must be checked for corrosion, as a car standing idle for long periods can suffer from moisture ingress and rust, particularly on a vehicle of this vintage.