2004 Mercedes-Benz SLK 1.8L Petrol · RN04 ABZ

The vehicle most recently passed its MOT on 10 September 2025, but the overall maintenance trend is concerning and suggests a vehicle that has suffered from environmental degradation. While it currently holds a valid certificate, the failure in June 2025 due to fractured rear coil springs and ABS and ESC faults indicates a period of mechanical decline. The persistence of corrosion-related advisories across multiple years suggests that structural and braking system integrity is worsening rather than being proactively managed. With a recorded mileage of 54,066 miles over twenty-two years, the vehicle has averaged approximately 2,458 miles per year. This exceptionally low annual usage is a double-edged sword; while the drivetrain and engine have seen minimal mechanical wear, the car exhibits classic symptoms of long-term standing. Low-mileage vehicles of this era often suffer from accelerated corrosion in areas that are not regularly cleaned or heated, as well as the perishing of rubber components and the degradation of lubricants and fluids regardless of the distance travelled. A prospective buyer must prioritize a thorough inspection of the underside, specifically the rear sub-frame and brake lines. The recurring advisories regarding corroded brake pipes and hose ferrules are critical, as these can lead to sudden hydraulic failure. During a test drive, listen for clunks or knocks over uneven surfaces, which would indicate that the previously noted anti-roll bar linkage and suspension arm play have returned or progressed. Ensure the ABS and ESC systems are fully operational and not merely reset, as these faults often stem from failing sensors or wiring loom corrosion. Given the low usage, check all tyre sidewalls for fine cracking or perishing, as rubber degrades with age even if the tread remains deep. Inspect the brake discs for heavy surface corrosion or binding calipers, which frequently occur when a vehicle sits idle. Verify the service history to ensure that engine oil, coolant, and brake fluids have been changed based on time intervals rather than mileage. Finally, test the operation of the folding roof mechanism and check the 12V battery health, as these systems are particularly prone to failure in low-use Mercedes models of this vintage.