2019 Mercedes-Benz SL65 AMG

The 2019 Mercedes-Benz SL65 AMG is a high-performance roadster featuring a handcrafted 6.0-liter twin-turbo V12 engine producing 621 horsepower and 738 lb-ft of torque, paired with an AMG Speedshift 7G-TRONIC automatic transmission. Other engine and transmission options for the 2019 SL lineup include the SL450’s 3.0L V6 turbo, the SL550’s 4.7L V8 Biturbo, and the AMG SL43’s 2.0L I4 Turbo. Owners often praise the SL65 AMG for its immense power, luxurious interior, and comfortable ride, while potential drawbacks include its high price, running costs, and somewhat dated technology compared to newer models.

Engine

6.0L Twin-Turbo V12

• Oil Leaks
  • Description/Symptoms: Oil leaks are a common concern, often originating from the valve cover gaskets, oil cooler lines, or the rear main seal. Symptoms include visible oil puddles under the car, a burning oil smell, and low oil levels.
  • Solution: Replacing the leaking gaskets or seals, or repairing/replacing the leaking oil cooler lines.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the location and severity of the leak.
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: The turbochargers can experience issues such as wastegate actuator failures or oil leaks. Symptoms include a loss of power, whistling noises from the engine bay, and potential check engine lights.
  • Solution: Replacement of the faulty turbocharger components or the entire turbocharger assembly.
  • Estimated Cost to Fix: $3,000 - $8,000+ per turbocharger.
  • Recalls: None Found

Transmission

AMG Speedshift 7G-TRONIC

• Harsh Shifting
  • Description/Symptoms: Some owners have reported instances of harsh or jerky shifting, particularly during downshifts or under heavy acceleration. This can be due to valve body issues, worn transmission mounts, or software glitches.
  • Solution: Addressing the cause of the harsh shifting could include a transmission flush, replacing the valve body, or reprogramming the transmission control module (TCM).
  • Estimated Cost to Fix: $300 - $3,000+, depending on the specific issue and repair.
  • Recalls: None Found

Suspension

• ABC (Active Body Control) Suspension Leaks/Failures
  • Description/Symptoms: The ABC suspension system, while providing excellent handling and ride comfort, is known for its complexity and potential for leaks or failures. Symptoms include the car sitting unevenly, warning lights on the dashboard, and a stiff or bouncy ride.
  • Solution: Identifying and repairing the source of the leak or replacing faulty components such as accumulators, struts, or the hydraulic pump.
  • Estimated Cost to Fix: $1,000 - $5,000+ depending on the component that needs to be replaced.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Some owners have experienced issues with excessive battery drain, particularly if the car is not driven frequently. This can be due to faulty modules or components that continue to draw power even when the car is off.
  • Solution: Diagnosing the source of the battery drain and replacing the faulty module or component.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the component.
  • Recalls: None Found
• COMAND System Malfunctions
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, or display issues.
  • Solution: Restarting the system, updating the software, or replacing the COMAND unit.
  • Estimated Cost to Fix: $100 - $2,000+ depending on the solution.
  • Recalls: None Found

Exterior

• Convertible Top Issues
  • Description/Symptoms: The retractable hardtop can experience issues with its operation, such as getting stuck, failing to open or close completely, or leaking.
  • Solution: Inspecting and lubricating the hinges and seals, repairing or replacing hydraulic components, or recalibrating the system.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the cause of the issue.
  • Recalls: None Found

Interior

• Seat Adjustment Motor Failures
  • Description/Symptoms: The power seat adjustment motors can fail, preventing the seats from moving.
  • Solution: Replacing the faulty motor or switch.
  • Estimated Cost to Fix: $300 - $800+ per motor.
  • Recalls: None Found

Summary

The 2019 Mercedes-Benz SL65 AMG, while offering exhilarating performance and luxury, can present owners with potential issues, particularly related to its complex engine, transmission, suspension, and electrical systems. Engine oil leaks and turbocharger problems can be costly to repair, while the ABC suspension is known for its maintenance demands. Electrical glitches and convertible top malfunctions can also occur. The severity and cost of these potential issues can range from minor annoyances to major repairs, making it essential for prospective buyers to have a thorough pre-purchase inspection performed by a qualified mechanic.