2017 Mercedes-Benz SL500

The 2017 Mercedes-Benz SL500 is a luxurious roadster known for its retractable hardtop, elegant design, and powerful engine. The SL500 is equipped with a 4.7-liter biturbo V8 engine that produces 449 horsepower and 516 lb-ft of torque. A nine-speed automatic transmission is standard. While appreciated for its smooth ride, potent engine, and refined interior, some owners have noted concerns regarding electronic glitches and the potential for expensive repairs down the line. Other engine options for the 2017 SL class include the SL450 (3.0L biturbo V6) and the AMG SL63/65 (V8/V12).

Engine

4.7L Biturbo V8

• Oil Leaks
  • Description/Symptoms: Oil leaks are common, particularly around the valve cover gaskets, oil filter housing, and rear main seal. Symptoms include visible oil drips, burning oil smell, and low oil level warnings.
  • Solution: Replacing the leaking gaskets or seals.
  • Estimated Cost to Fix: $200 - $1500+, depending on the location and complexity of the repair.
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: The turbochargers can develop problems, including wastegate actuator failure or oil leaks. Symptoms include reduced power, unusual noises from the engine, and a check engine light.
  • Solution: Replacing the turbocharger or repairing the wastegate actuator.
  • Estimated Cost to Fix: $2,000 - $5,000+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough Shifting
  • Description/Symptoms: Some owners have reported rough or jerky shifting, especially when cold or during certain gear changes.
  • Solution: A software update or a transmission fluid flush might resolve the issue. In more severe cases, valve body replacement or transmission rebuild/replacement might be necessary.
  • Estimated Cost to Fix: $200 - $5,000+
  • Recalls: None Found

Suspension

• Air Suspension Problems (If Equipped with ABC)
  • Description/Symptoms: Models equipped with the Active Body Control (ABC) suspension can experience leaks, pump failures, or strut issues. Symptoms include uneven ride height, warning lights, and a harsh ride.
  • Solution: Replacing the faulty components, such as struts, pump, or hydraulic lines. Flushing the ABC fluid can sometimes help.
  • Estimated Cost to Fix: $500 - $3,000+ per component.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: The SL500 can suffer from parasitic battery drain, leading to a dead battery, especially if the car sits for extended periods.
  • Solution: Identifying and addressing the source of the drain (e.g., faulty module, improperly installed aftermarket accessories).
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found
• COMAND System Issues
  • Description/Symptoms: The COMAND infotainment system can experience glitches, including freezing, screen blackouts, and navigation problems.
  • Solution: Software updates, system resets, or component replacement may be necessary.
  • Estimated Cost to Fix: $100 - $1,500+
  • Recalls: None Found

Exterior

• Retractable Hardtop Malfunctions
  • Description/Symptoms: The retractable hardtop mechanism can experience problems, including failure to open or close, unusual noises during operation, and error messages.
  • Solution: Diagnosing and repairing the hydraulic system, sensors, or mechanical linkages.
  • Estimated Cost to Fix: $500 - $4,000+
  • Recalls: None Found

Interior

• Seat Heater/Cooler Failures
  • Description/Symptoms: The seat heating or cooling functions may fail, leaving the seats uncomfortable.
  • Solution: Replacing the heating/cooling element or control module.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Summary

The 2017 Mercedes-Benz SL500 offers a luxurious and powerful driving experience, but potential buyers should be aware of some common issues. Electrical glitches and potential problems with the retractable hardtop can be irritating and expensive to repair. Issues with the engine and transmission are also a cause for concern, potentially costing thousands of dollars to repair. While the severity of these issues varies, pre-purchase inspection and a thorough maintenance history are essential when considering a used SL500.