2017 Mercedes-Benz SL65 AMG

The 2017 Mercedes-Benz SL65 AMG is the top-of-the-line performance variant of the SL roadster, equipped with a hand-built 6.0-liter twin-turbocharged V12 engine producing 621 horsepower and 738 lb-ft of torque. The other engine option is a 4.7 liter twin-turbocharged V8 producing 449 horsepower and 516 lb-ft of torque, found in the SL550. Both engines are mated to a 7-speed automatic transmission. Owners generally praise the SL65 AMG for its immense power, luxurious interior, and comfortable ride, while some criticisms include its high price, complex electronics, and potential for costly repairs.

Engine

6.0L Twin-Turbocharged V12

• Oil Leaks
  • Description/Symptoms: Oil leaks can develop from various locations, including valve cover gaskets, oil pan gasket, and turbocharger oil lines. Symptoms include visible oil drips, burning oil smell, and low oil level warnings.
  • Solution: Replacing the leaking gaskets or seals. For turbocharger oil lines, replacement is typically necessary.
  • Estimated Cost to Fix: $200 - $2,000+, depending on the location and complexity of the leak. Turbocharger oil line replacement could reach the higher end of this range.
  • Recalls: None Found
• Coil Pack Failure
  • Description/Symptoms: Misfires, rough running engine, check engine light.
  • Solution: Replacing faulty coil packs.
  • Estimated Cost to Fix: $150 - $400+ per coil pack, depending on the shop and parts used.
  • Recalls: None Found

Transmission

7-Speed Automatic (7G-Tronic)

• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibrations during gear changes, especially at lower speeds. May also notice delayed or harsh shifting.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found

Suspension

• ABC (Active Body Control) System Leaks/Failures
  • Description/Symptoms: The ABC system can develop leaks in the hydraulic lines, struts, or pump. Symptoms include a sagging vehicle, uneven ride height, warning lights, and a stiff or bouncy ride.
  • Solution: Replacing leaking lines, struts, or the pump. Flushing and refilling the ABC system fluid.
  • Estimated Cost to Fix: $500 - $5,000+ depending on the component needing replacement. A pump replacement is typically the most expensive repair.
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: The vehicle’s battery can drain quickly, especially if left sitting for extended periods. This can lead to starting problems or the need for frequent jump starts.
  • Solution: Diagnosing the source of the parasitic draw and repairing the affected component. Common culprits include the infotainment system, door control modules, and seat control modules.
  • Estimated Cost to Fix: $100 - $1,000+, depending on the source of the drain.
  • Recalls: None Found
• Infotainment System Malfunctions
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, or complete failure.
  • Solution: Software updates, system reset, or replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 - $2,500+ depending on the severity.
  • Recalls: None Found

Exterior

• Convertible Top Issues
  • Description/Symptoms: Problems with the convertible top mechanism, including slow operation, failure to open or close completely, and error messages.
  • Solution: Diagnosing and repairing the hydraulic system, sensors, or motors responsible for operating the top.
  • Estimated Cost to Fix: $500 - $3,000+, depending on the complexity of the repair.
  • Recalls: None Found

Interior

• Seat Control Module Issues
  • Description/Symptoms: Malfunctioning seat controls, including the inability to adjust seat position, lumbar support, or massage functions.
  • Solution: Replacing the faulty seat control module.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Summary:

The 2017 Mercedes-Benz SL65 AMG, while offering exhilarating performance, can be prone to several potentially costly issues. The ABC suspension, electrical gremlins, and potential engine oil leaks are areas of concern. Severity ranges from minor inconveniences to significant repairs, with costs varying widely depending on the specific issue and the shop performing the work. Potential buyers should carefully inspect the vehicle’s service history and consider a pre-purchase inspection by a qualified Mercedes-Benz mechanic.