2016 Mercedes-Benz SL65 AMG

The 2016 Mercedes-Benz SL65 AMG is a high-performance luxury roadster, boasting a handcrafted 6.0-liter twin-turbo V12 engine producing 621 horsepower and 738 lb-ft of torque. Other SL models offered inline-4, V6, and V8 engine options. The SL65 is renowned for its blistering acceleration, opulent interior, and retractable hardtop. However, some owners have reported issues concerning the car’s complexity, running costs, and reliability, while others appreciate its luxurious features, powerful engine, and exclusivity.

Engine

6.0L Twin-Turbo V12

• Oil Leaks
  • Description/Symptoms: Oil leaks commonly occur from the valve cover gaskets and the oil cooler lines. Symptoms include visible oil drips under the car, a burning oil smell, and low oil levels.
  • Solution: Replace the valve cover gaskets and/or oil cooler lines.
  • Estimated Cost to Fix: $500 - $2000+ depending on the source of the leak and if you are using OEM or aftermarket parts.
• Ignition Coil Failure
  • Description/Symptoms: Misfires, rough idling, and a check engine light are common symptoms of failing ignition coils. The V12 engine has 12 ignition coils, and individual failures can occur.
  • Solution: Replace the faulty ignition coil(s).
  • Estimated Cost to Fix: $200 - $500+ per coil including labor.
• Turbocharger Issues
  • Description/Symptoms: Reduced power, whistling noises, and smoke from the exhaust can indicate turbocharger problems. Issues can range from worn bearings to failed seals.
  • Solution: Repair or replace the affected turbocharger(s).
  • Estimated Cost to Fix: $3,000 - $8,000+ depending on the extent of the damage and parts.

Transmission

AMG Speedshift 7G-TRONIC PLUS

• Rough Shifting
  • Description/Symptoms: Some owners report rough or delayed shifting, particularly when the transmission is cold. This can manifest as harsh upshifts or downshifts.
  • Solution: Perform a transmission fluid flush and filter replacement. In more severe cases, valve body repair or replacement may be necessary.
  • Estimated Cost to Fix: $300 - $3,000+ depending on the complexity of the problem

Suspension

• ABC (Active Body Control) System Leaks/Failure
  • Description/Symptoms: The ABC system is prone to leaks, leading to suspension sagging, uneven ride height, and warning messages on the dashboard. This is due to the high pressures involved.
  • Solution: Identify and repair leaks in the system, which may involve replacing hydraulic lines, accumulators, or the pump.
  • Estimated Cost to Fix: $500 - $5,000+ depending on the severity and parts required. Complete system overhauls can be significantly more expensive.

Electrical

• Battery Drain
  • Description/Symptoms: Excessive battery drain can occur due to various electrical components not shutting down properly or parasitic draws.
  • Solution: Diagnose and repair the source of the battery drain. This may involve tracing wiring, replacing faulty modules, or addressing issues with the vehicle’s computer system.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the source of the issue.
• COMAND System Issues
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, or complete failure. This can affect navigation, audio, and other vehicle functions.
  • Solution: Software updates may resolve some issues. In other cases, the COMAND unit may need to be repaired or replaced.
  • Estimated Cost to Fix: $100 - $2,000+ depending on repair vs replace.

Exterior

• Retractable Hardtop Malfunctions
  • Description/Symptoms: The retractable hardtop can experience malfunctions, such as getting stuck, failing to open or close completely, or producing unusual noises.
  • Solution: Inspect the hydraulic system, sensors, and latching mechanisms. Repair or replace any faulty components.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the nature of the problem.

Interior

• No Issues Found

Recalls

• None Found

Summary

The 2016 Mercedes-Benz SL65 AMG is a powerful and luxurious vehicle, but like many high-performance cars, it can experience a variety of issues, particularly as it ages. The most commonly reported problems relate to the engine (oil leaks, ignition coils, turbochargers), transmission (rough shifting), suspension (ABC system leaks), and electrical system (battery drain, COMAND system issues). The severity and cost of these repairs can vary significantly, with some issues being relatively minor and others requiring extensive and expensive work.