2009 Mercedes-Benz SLK 2.0L Petrol · ST59 FPD

The most recent MOT test for this 2009 Mercedes-Benz SLK occurred on 2025-11-11, resulting in a clean pass with no recorded defects. However, the preceding MOT history reveals a pattern of recurring and escalating mechanical issues, particularly in the braking, suspension, and exhaust systems. The vehicle failed multiple tests between 2022 and 2024, with major failures including a fractured rear coil spring, binding front service brakes, and significant exhaust leaks, indicating a deterioration in structural and functional integrity. While the 2024-11-29 MOT passed with only advisories—such as minor exhaust leaks and tyre wear—these recurring problems suggest that the vehicle has not been adequately maintained or has suffered from prolonged periods of inactivity or misuse, which accelerates wear in critical components. The recorded mileage of 90,886 miles for a vehicle aged approximately 17 years represents an unusually low annual usage rate of around 5,346 miles per year, which is far below the average for its class. Such low mileage often correlates with vehicles that are parked for extended periods, particularly in urban or suburban settings where demand for daily use is lower. However, this usage profile can mask underlying issues, as standing vehicles are more prone to corrosion in brake systems, suspension components, and the exhaust manifold, where moisture and contaminants accumulate. Additionally, fluid degradation—such as brake fluid, differential fluid, or coolant—can accelerate without regular movement, leading to premature failure of seals, hoses, or mechanical linkages. The combination of low mileage and a history of MOT failures suggests that the vehicle may have been neglected during periods of disuse, exacerbating wear in components that are not actively engaged during driving. To proceed with a thorough inspection, the prospective buyer should prioritise checking the front and rear braking system for signs of corrosion, binding calipers, or uneven wear patterns that could indicate the previously reported binding issues. During a test drive, listen for a grinding or squeaking noise from the front brakes, particularly when applying the pedal firmly, as this may signal worn brake pads or warped discs. Inspect the rear coil spring for any visible signs of further deterioration or sagging, and listen for a clunking or rattling sound from the suspension when driving over bumps, which could confirm the fractured spring’s impact on ride quality. The exhaust system should be examined for leaks at the manifold, catalytic converter, and muffler connections, as the major exhaust failure from 2024-09-06 suggests that further deterioration is likely if not already addressed. Verify that the steering rack and track rod ends have been serviced, as the slight play in these components could lead to misalignment, poor handling, or premature wear on tyres. For a vehicle of this age and mileage, the buyer should also conduct a detailed inspection of the tyres for sidewall perishing, which is common in older vehicles due to prolonged exposure to UV light and environmental conditions. Check for cracks or blistering along the sidewalls, as this can compromise tyre integrity and lead to sudden failure. The battery should be tested for voltage and corrosion on the terminals, as standing vehicles are particularly susceptible to battery drain and terminal corrosion, which can affect electrical systems and the starter motor. Fluid levels should be checked and topped up if necessary, with particular attention to the brake fluid, differential fluid, and coolant, as these fluids degrade over time even when not in use. Finally, a review of any service records or a professional inspection for items such as the suspension bushings, exhaust manifold bolts, and steering components would be prudent, given the history of MOT failures. If the buyer is unable to access service history, a comprehensive mechanical check by a qualified technician is strongly recommended to assess the extent of the previous issues and plan for necessary repairs before purchase.