2006 Mercedes-Benz S55 AMG

The 2006 Mercedes-Benz S55 AMG is a high-performance luxury sedan that delivers impressive power and comfort. The S55 AMG comes standard with a supercharged 5.4L V8 engine that produces 493 horsepower and 516 lb-ft of torque, paired with a 5-speed automatic transmission. Other engine options for the 2006 S-Class include a 3.7L V6, 4.3L V8, and 5.0L V8. The S55 AMG is praised for its potent engine, luxurious interior, and advanced features. However, some common complaints include high maintenance costs, complex electronics, and potential issues with the air suspension.

Engine

5.4L Supercharged V8

• Intercooler Pump Failure
  • Description/Symptoms: The intercooler pump circulates coolant through the intercooler system to keep the intake air temperature down. If the pump fails, it can result in a loss of power, especially in hot weather. The engine might feel sluggish, and you may experience reduced acceleration.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets are common as the rubber gaskets age and harden. This can result in oil drips, a burning smell, and potentially low oil levels.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

• Torque Converter Failure
  • Description/Symptoms: Shuddering during gear changes, difficulty shifting, or complete loss of drive.
  • Solution: Torque converter replacement or transmission rebuild/replacement.
  • Estimated Cost to Fix: $1500 - $4000+
  • Recalls: None Found
• Conductor Plate Failure
  • Description/Symptoms: Erratic shifting, getting stuck in gear, or a complete loss of gear selection. This part contains the transmission’s electronic control unit.
  • Solution: Replacement of the conductor plate and potentially the valve body if it’s been damaged.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Suspension

• Airmatic System Failure
  • Description/Symptoms: The Airmatic suspension is prone to leaks and failures. Symptoms include the car sagging on one or more corners, a warning light on the dashboard, and a noisy air compressor. The compressor may run continuously trying to maintain pressure.
  • Solution: Replace the affected air struts, air compressor, or valve block. Diagnose the system for leaks using soapy water or a smoke test.
  • Estimated Cost to Fix: $800 - $2000+ per strut, $500 - $1000+ for the compressor.
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: The S55 AMG has a complex electrical system that can be prone to parasitic battery drains. This can result in a dead battery, especially if the car sits for extended periods.
  • Solution: Diagnose the source of the battery drain, which could be a faulty module, relay, or wiring issue.
  • Estimated Cost to Fix: $100 - $500+ (depending on the source of the drain and labor hours required for diagnosis)
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: Malfunctions with lights, wipers, power windows, or other electrical components. The SAM module controls various electrical functions, and failure can cause a wide range of problems.
  • Solution: Replace the faulty SAM module and reprogram it to the vehicle.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust can occur on the body panels, especially in areas prone to moisture and road salt.
  • Solution: Repair or replace affected panels and apply rust protection.
  • Estimated Cost to Fix: Varies greatly depending on the severity of the rust.
  • Recalls: None Found

Interior

• Command System Issues
  • Description/Symptoms: The COMAND system, which controls the navigation, audio, and climate control, can experience glitches, screen failures, or complete shutdowns.
  • Solution: Repair or replace the COMAND unit.
  • Estimated Cost to Fix: $500 - $2000+
  • Recalls: None Found

Summary

The 2006 Mercedes-Benz S55 AMG offers exhilarating performance and luxurious amenities, but potential buyers should be aware of the common issues. The most significant concerns revolve around the air suspension, electrical system, and transmission. Repairs can be expensive, so a thorough pre-purchase inspection is essential. Prioritizing maintenance and addressing issues promptly can help mitigate some of these risks and keep the car in good running condition.