2006 Mercedes-Benz S65 AMG

The 2006 Mercedes-Benz S65 AMG is a high-performance luxury sedan that offered impressive power and features for its time. It’s powered by a hand-built 6.0L Twin-Turbo V12 engine producing 604 horsepower and 738 lb-ft of torque, paired with a 5-speed automatic transmission. While the S-Class is known for its comfort and technology, the AMG variant delivers blistering performance. Common praises include its luxurious interior, powerful engine, and comfortable ride. Criticisms often focus on high maintenance costs and complex electronics that can be prone to failure.

Engine

6.0L Twin-Turbo V12 (M275)

• Coil Pack Failure
  • Description/Symptoms: Misfires, rough idling, loss of power, check engine light. Can be caused by heat and age.
  • Solution: Replace the faulty coil pack(s).
  • Estimated Cost to Fix: $200 - $600+ per coil pack, depending on labor and parts source.
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks onto the exhaust manifolds, causing a burning smell. Visible oil around the valve covers.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $500 - $1500+, due to the complexity of accessing the valve covers.
  • Recalls: None Found
• ABC (Active Body Control) Pump Failure
  • Description/Symptoms: The ABC pump is responsible for hydraulic pressure in the active suspension system. The engine provides the drive power to the pump. Common symptoms of a failing ABC pump are loud noises coming from the pump, especially during turns, hard or rough suspension, and a warning light on the dash.
  • Solution: Replacing the ABC pump.
  • Estimated Cost to Fix: $1800-$3000+
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Reduced power, whistling or whining noises from the engine, smoke from the exhaust, and potential oil leaks.
  • Solution: Turbocharger replacement or rebuild.
  • Estimated Cost to Fix: $3,000-$7,000+ (depending on rebuild vs. replacement and if one or both turbos need attention).
  • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

• Conductor Plate Failure
  • Description/Symptoms: Harsh or erratic shifting, getting stuck in a gear, or complete loss of gear engagement. Often accompanied by transmission fault codes.
  • Solution: Replace the conductor plate inside the transmission.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Torque Converter Failure
  • Description/Symptoms: Shuddering or vibrations during acceleration, especially at lower speeds. Slipping sensation during gear changes.
  • Solution: Replace the torque converter.
  • Estimated Cost to Fix: $1500 - $3000+ (including transmission removal and fluid).
  • Recalls: None Found

Suspension

• ABC (Active Body Control) Strut Failure
  • Description/Symptoms: Leaning to one side, uneven ride height, a harsh ride, and suspension warning lights.
  • Solution: Replace the faulty ABC strut(s).
  • Estimated Cost to Fix: $1500 - $4000+ per strut, depending on OEM vs. aftermarket parts and labor.
  • Recalls: None Found
• ABC System Hose Leaks
  • Description/Symptoms: Loss of hydraulic fluid, which can lead to suspension malfunctions. Visible leaks around the ABC hoses and connections.
  • Solution: Replace the leaking ABC hoses.
  • Estimated Cost to Fix: $500 - $2000+ depending on the location and complexity of the hose replacement.
  • Recalls: None Found

Electrical

• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Issues with various electrical components such as lights, wipers, power windows, or central locking. Can be caused by water intrusion or electrical surges.
  • Solution: Replace or reprogram the faulty SAM unit.
  • Estimated Cost to Fix: $800 - $2000+
  • Recalls: None Found
• EIS (Electronic Ignition Switch) Failure
  • Description/Symptoms: Difficulty starting the car, the key not being recognized, or the steering lock malfunctioning.
  • Solution: Replace the EIS module and reprogram it to the vehicle.
  • Estimated Cost to Fix: $1000 - $2500+
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Battery draining overnight or within a few days. Difficulty starting the car.
  • Solution: Diagnose and repair the parasitic draw (often caused by faulty modules or relays).
  • Estimated Cost to Fix: $100 - $1000+ (depending on the source of the drain and diagnostic time).
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust can develop on the fenders, door bottoms, and around the trunk lid, especially in areas with harsh winters or coastal climates.
  • Solution: Repair or replace rusted panels, and repaint.
  • Estimated Cost to Fix: $500 - $5000+ (depending on the extent of the rust).
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, getting stuck, or making excessive noise.
  • Solution: Repair or replace the sunroof motor, tracks, or related components.
  • Estimated Cost to Fix: $300 - $1500+
  • Recalls: None Found
• Command System Malfunctions
  • Description/Symptoms: Screen freezing, navigation issues, audio problems, or complete system failure.
  • Solution: Software update, component replacement, or head unit replacement.
  • Estimated Cost to Fix: $200 - $2000+ (depending on the severity of the issue).
  • Recalls: None Found

Summary

The 2006 Mercedes-Benz S65 AMG offers impressive performance and luxury but comes with potential reliability issues. The engine and suspension systems are particularly prone to problems, and repairs can be costly due to the complexity of the vehicle and the price of AMG-specific parts. Electrical gremlins can also be a nuisance. Potential buyers should be aware of these common issues and factor in maintenance costs when considering this vehicle. Regular maintenance and proactive repairs are crucial to keeping this car running smoothly.