2010 Mercedes-Benz SL65 AMG

The 2010 Mercedes-Benz SL65 AMG is a high-performance grand tourer known for its immense power and luxurious features. It’s powered by a hand-built 6.0L Biturbo V12 engine that produces 604 horsepower and 738 lb-ft of torque, paired with a 5-speed automatic transmission. The SL lineup also included the SL550 with a 5.5L V8 and the SL63 AMG with a 6.2L V8. Owners often praise the SL65 AMG’s exhilarating acceleration and opulent cabin, but potential drawbacks include high maintenance costs, complex electronics, and potential for expensive repairs.

Engine

6.0L Biturbo V12

• Coil Pack Failure
  • Description/Symptoms: Misfires, rough running engine, check engine light. Often occurs due to heat and age.
  • Solution: Replace faulty coil pack(s).
  • Estimated Cost to Fix: $300 - $600+ per coil pack (parts and labor).
  • Recalls: None Found
• ABC (Active Body Control) Pump Failure
  • Description/Symptoms: ABC warning light, sagging suspension, poor ride quality, pump noise. While technically hydraulic, the pump’s operation is crucial for engine performance.
  • Solution: Replace the ABC pump.
  • Estimated Cost to Fix: $2000 - $3000+ (parts and labor).
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Whining noise from the turbo, loss of power, check engine light.
  • Solution: Replace or rebuild the turbocharger.
  • Estimated Cost to Fix: $4000-$8000+ (parts and labor).
  • Recalls: None Found

Transmission

5-Speed Automatic

• Valve Body Issues
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, transmission fault codes.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $1500 - $3000+ (parts and labor).
  • Recalls: None Found

Suspension

• ABC (Active Body Control) Strut Failure
  • Description/Symptoms: Leaking fluid, sagging suspension, uneven ride height, harsh ride.
  • Solution: Replace the faulty ABC strut(s).
  • Estimated Cost to Fix: $2000 - $4000+ per strut (parts and labor).
  • Recalls: None Found
• ABC Hydraulic Line Leaks
  • Description/Symptoms: Accumulator failure results in diminished Active Body Control (ABC) function, leading to a noticeably firmer ride and compromised handling. This is often accompanied by visible fluid leaks near suspension components, an illuminated ABC warning light on the dashboard, and a potential drop in the vehicle’s ride height.
  • Solution: Replace the Accumulator.
  • Estimated Cost to Fix: $1,500 - $3,000+ (parts and labor).
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: Dead battery, difficulty starting, electrical system malfunctions. Can be caused by faulty modules or parasitic drain.
  • Solution: Diagnose and repair the source of the drain, replace battery.
  • Estimated Cost to Fix: $200 - $1000+ (depending on the cause).
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Various electrical malfunctions, including lighting issues, wiper problems, and issues with other electronic systems.
  • Solution: Replace the faulty SAM unit.
  • Estimated Cost to Fix: $800 - $1500+ (parts and labor).
  • Recalls: None Found
• Convertible Top Malfunctions
  • Description/Symptoms: Top not operating correctly, getting stuck, error messages. Can be caused by hydraulic issues, sensor problems, or motor failure.
  • Solution: Diagnose and repair the fault in the convertible top system.
  • Estimated Cost to Fix: $500 - $3000+ (depending on the cause).
  • Recalls: None Found

Exterior

• Convertible Top Seal Leaks
  • Description/Symptoms: Water leaks into the cabin, especially around the windows or roof seams.
  • Solution: Replace worn or damaged seals.
  • Estimated Cost to Fix: $300 - $1000+ (depending on the extent of the leaks and parts needed).
  • Recalls: None Found

Interior

• COMAND System Issues
  • Description/Symptoms: Malfunctioning screen, navigation problems, audio issues, unresponsive buttons.
  • Solution: Repair or replace the COMAND unit.
  • Estimated Cost to Fix: $500 - $2000+ (depending on the issue and whether repair or replacement is needed).
  • Recalls: None Found
• Seat Motor Failure
  • Description/Symptoms: Seat not adjusting properly, motor noise.
  • Solution: Replace the faulty seat motor.
  • Estimated Cost to Fix: $300 - $800+ (parts and labor).
  • Recalls: None Found

Summary

The 2010 Mercedes-Benz SL65 AMG, while offering incredible performance, can be prone to several potentially expensive issues. The ABC suspension system, in particular, is a known source of trouble. Electrical gremlins and convertible top issues are also common complaints. The severity and cost of repairs can be high, making it crucial to have a pre-purchase inspection performed by a qualified Mercedes-Benz technician. Addressing these issues proactively is vital for maintaining the SL65 AMG’s performance and overall value.