1997 Mercedes-Benz SLK 2.3L Petrol · P758 CSS

A clean and consistent MOT trajectory defines this 1997 Mercedes-Benz SLK, with the most recent test on 3 June 2025 recorded as a pass with no advisories or defects noted. Across the five recorded visits since 2022 the vehicle has only failed once, on 30 May 2023, and importantly that failure carries no recorded defect entry, suggesting either an administrative refusal or a rectifiable issue addressed immediately, given a pass was issued on the same date. Two further clean passes in 2024 and 2025 underline a stable, well-maintained roadworthiness profile rather than a deteriorating one. For a nearly three-decade-old specialist vehicle, this pattern of unblemished test results is notable and suggests the car has not been accumulating the sort of structural or corrosion concerns that often plague vehicles of this vintage. The recorded mileage of 74,937 miles against a 1997 build year equates to an average annual accumulation of roughly 2,584 miles, which is exceptionally low. This figure indicates either limited seasonal use, long periods of storage, or the vehicle being reserved primarily as a weekend or fair-weather car. Such low mileage can be a mixed blessing mechanically, as prolonged standing can be just as hard on certain components as high use. Rubber elements, seals, and brake hydraulic systems in particular can deteriorate through inactivity, while conversely the engine, gearbox, and drivetrain may have suffered less wear than the calendar age would normally suggest. Buyers should therefore weigh the cosmetic and mechanical preservation benefits of light use against the risks associated with a vehicle that may have spent significant stretches off the road. For a pre-purchase inspection, particular attention should be paid to the areas most vulnerable on a low-mileage R170-generation SLK. Check for perished or cracked suspension bushes, coil spring seats, and anti-roll bar links, as these rubber components can harden and degrade with age regardless of mileage. On a test drive, listen for clonking or knocking from the front suspension over uneven surfaces, and feel for any vagueness or knocking through the steering, which could indicate worn lower control arms or tie rod ends. The roof mechanism also warrants close inspection, including the operation of the hydraulic pump, the condition of the rear window seal, and any signs of water ingress in the boot or cabin carpets. Brake feel should be firm and progressive, with no judder under heavy application, and the discs should be examined for surface rust or lipping consistent with infrequent use. Given the SLK's age, a thorough examination underneath the vehicle for any emerging corrosion is essential, particularly around the subframe mounting points, jacking points, and around the rear axle. Although the MOT record does not flag any advisories in these areas, the absence of recorded defects on a 29-year-old car can be misleading if previous advisories were simply left to deteriorate between tests. Inspect all brake pipes and hoses for surface corrosion or brittleness, and look for any signs of oil misting or weeping around the cam covers, sump, and hydraulic roof pump. A compression test or at minimum a careful cold-start observation would help confirm internal engine health given the low annual mileage. Ultimately, the paperwork suggests a well-cared-for example, but a mechanical inspection and ideally a Mercedes-Benz specialist appraisal remain prudent before committing to a purchase of an increasingly collectible early SLK.