Purchasing a used sports car can be an exciting venture, blending performance with a touch of luxury at a more accessible price point. For those considering a pre-owned Mercedes-Benz SLK, particularly the 2007 model, understanding the realities of ownership and potential maintenance is crucial. This article delves into the experience of one owner who recently acquired a 2007 Mercedes Slk 280, offering a transparent look at the initial maintenance and repairs undertaken to bring the vehicle up to an excellent standard.
Initial Investment: Buying a 2007 Mercedes SLK
In November 2022, an enthusiast took the plunge and purchased a 2007 Mercedes SLK 280 with 73,000 miles on the clock for $14,250. Recognizing the importance of preventative maintenance and addressing any wear and tear typical of a vehicle of this age, the new owner embarked on a journey of refurbishment. Leveraging online communities like SLK World for invaluable information and guidance, a comprehensive plan was put into action to ensure the SLK was in top condition.
DIY Maintenance and Repairs on a 2007 SLK 280
A significant portion of the initial work was undertaken personally by the owner, demonstrating the accessibility of certain maintenance tasks for those with some mechanical inclination. The focus was on both preventative measures and addressing immediate needs. The following components were replaced or upgraded in November and December 2022:
- Lighting Enhancements: New LED front headlamp bulbs were installed for improved visibility and a modern aesthetic, sourced from O’Reillys for $50. A new driver side marker bulb and socket, costing $40 from a Mercedes-Benz dealer, were also fitted, crucially including a repair to the original plastic side marker housing to prevent water ingress – a common issue in older vehicles. Even the trunk light received attention with a new bulb from Oreillys for $5.
- Wheels and Tires: Preparing for winter conditions, a new set of wheels and snow tires were acquired from Tire Rack for $1200, ensuring safety and optimal handling in colder climates.
- Audio Upgrade: Addressing a faulty driver’s side stereo speaker, a replacement was purchased from a Mercedes-Benz dealer for $200, restoring the audio experience.
- Exterior Trim: A new driver side marker lens for the exterior rear view mirror was sourced from a Mercedes-Benz dealer for $60, rectifying any cosmetic damage and maintaining the vehicle’s appearance.
- Underbody Protection: A new plastic center splash guard, costing $90 from a Mercedes-Benz dealer, was installed to protect the undercarriage from road debris and moisture.
- Filters: Routine maintenance items including a new cabin air filter ($20 from Oreillys) and new engine air filters ($25 from Oreillys) were replaced to ensure optimal air quality and engine performance.
- Ignition System: New spark plugs were installed, purchased from a Mercedes-Benz dealer for $115, contributing to efficient engine operation.
- Convenience and Functionality: New trunk struts, costing $60 from a Mercedes-Benz dealer, restored the smooth operation of the trunk. A new battery, sourced from a Mercedes-Benz dealer for $200, ensured reliable starting and electrical system performance.
- Addressing Engine Codes: To resolve DTC P0015, a new exhaust bank 1 cam adjuster magnet was installed on the passenger side, purchased from a Mercedes-Benz dealer for $30. Similarly, to address DTC P0128, a new thermostat was fitted, accompanied by a coolant drain and refill, costing $150 from a Mercedes-Benz dealer and ensuring proper engine temperature regulation.
- Preventative Maintenance and Noise Reduction: A new secondary air injection pump was proactively replaced ($150 from a Mercedes-Benz dealer) due to excessive noise, even without a Diagnostic Trouble Code (DTC). A new washer fluid pump motor ($15 from Oreillys) addressed another minor but essential functionality.
- Oil Catch Can Installation: An oil catch can was installed ($40 from Amazon) as a preventative measure to mitigate oil and PCV contaminants from entering the intake manifold. Interestingly, after approximately 1,000 miles, the catch can remained dry, indicating a healthy engine in this regard.
- Infotainment Upgrade: Modernizing the in-car technology, a radio upgrade was performed, incorporating navigation, Bluetooth, CarPlay, USB connectivity, a 7” screen, and a backup camera. This comprehensive upgrade, sourced from Car Navi Player, cost $507 and significantly enhanced the driving experience.
The subtotal for these owner-performed works amounted to $2957.00, demonstrating a significant investment in parts and proactive maintenance.
Professional Servicing for Optimal Performance
While the owner tackled numerous tasks personally, certain maintenance aspects are best left to professional mechanics to ensure accuracy and expertise. The following services were performed by professional repair shops:
- Wheel Alignment: A wheel alignment, crucial for tire wear and handling, was performed by a Mercedes-Benz dealer in Ann Arbor, MI, for $190.
- Brake Fluid Flush: A brake fluid flush, essential for maintaining braking system performance and safety, was also conducted at the Mercedes-Benz dealer in Ann Arbor, MI, for $190.
- Fuel Filter Replacement: A fuel filter replacement, vital for fuel system cleanliness and engine performance, was carried out by Motorwerks in Commerce Twp., MI, for $500.
- Oil and Filter Change with Analysis: A comprehensive oil and filter change, including an oil analysis to assess engine health, was performed by Motorwerks in Commerce Twp., MI, for $250. The oil analysis is a particularly valuable step in used car ownership, providing insights into potential internal wear and tear.
- OBD Scan and Report: A thorough OBD scan with a full diagnostic report was conducted by Motorwerks in Commerce Twp., MI, for $180, identifying any potential underlying issues not immediately apparent.
- Transmission Fluid and Filter Service: Recognizing the importance of transmission maintenance, a transmission fluid drain and fill, along with a filter replacement, was performed by Motorwerks in Commerce Twp., MI, for $520, contributing to smooth gear changes and transmission longevity.
The subtotal for work performed by professional repair shops totaled $1830.00.
Total Cost of Ownership: Initial Phase for a 2007 SLK 280
Combining both the DIY and professional services, the total spent on initial maintenance and repairs reached $4787.00. Adding this to the initial vehicle purchase price of $14,250.00, the grand total for purchase and initial refurbishment amounted to $19,187.00.
Addressing the Balance Shaft Concern in the M272 Engine
A known concern with the M272 engine, which powers the 2007 SLK 280, is the balance shaft issue. The owner acknowledges that their engine serial number falls within the affected range. However, at 75,000 miles, no symptoms have manifested, and the vehicle runs and appears in excellent condition with minimal rust. Reassuringly, the oil analysis revealed no concerns related to balance shaft failure. The CarFax report also indicated diligent previous owner maintenance, adding to the positive outlook.
While aware of the potential issue, the owner has a contingency plan. Motorwerks in Commerce Twp., MI, quoted approximately $3500 for a balance shaft repair, if addressed early and without further engine damage. This potential future cost is factored into the long-term ownership consideration.
Conclusion: Embracing 2007 Mercedes SLK Ownership
Despite the initial investment in maintenance and the awareness of potential future repairs like the balance shaft issue, the owner expresses strong satisfaction with their 2007 Mercedes SLK. After two months of ownership, the enjoyment of driving the SLK outweighs the costs and efforts. This real-world account provides valuable insight for anyone considering a used 2007 Mercedes SLK, highlighting the importance of proactive maintenance and budgeting for potential repairs, while also showcasing the rewards of owning a well-maintained example of this iconic roadster.
