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2006 Mercedes-Benz S600

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By Research the Car 5 min read

The 2006 Mercedes-Benz S600 represents the pinnacle of luxury and performance in the W220 S-Class generation. This particular model features a potent 5.5-liter twin-turbocharged V12 engine producing 493 horsepower and 590 lb-ft of torque, mated to a 5-speed automatic transmission. Other available engine options in the 2006 S-Class range included various V6 and V8 engines, and even a diesel option in some markets. The S600 is praised for its smooth ride, powerful engine, and luxurious interior. However, like many high-end vehicles, it can be prone to expensive repairs and maintenance, especially as it ages. Some common complaints revolve around the complex electronics, air suspension system, and the high cost of replacement parts.

Engine

5.5L Twin-Turbo V12 (M275)

  • Coil Pack Failure
    • Description/Symptoms: Misfires, rough running engine, check engine light. Often specific to one or more cylinders.
    • Solution: Replace the faulty coil pack(s).
    • Estimated Cost to Fix: $200 - $400 per coil pack (parts and labor).
    • Recalls: None Found
  • Valve Cover Gasket Leaks
    • Description/Symptoms: Oil leaks onto the exhaust manifolds, causing a burning smell. Visible oil accumulation around the valve covers.
    • Solution: Replace the valve cover gaskets.
    • Estimated Cost to Fix: $600 - $1200 (parts and labor).
    • Recalls: None Found
  • Turbocharger Issues
    • Description/Symptoms: Reduced power, whistling noises from the engine bay, check engine light. Can be caused by failing turbo seals or bearing issues.
    • Solution: Rebuild or replace the affected turbocharger(s).
    • Estimated Cost to Fix: $2000 - $5000 per turbocharger (parts and labor).
    • Recalls: None Found
  • Coolant Leaks (Various Locations)
    • Description/Symptoms: Low coolant level, overheating, visible coolant leaks under the vehicle. Common leak points include hoses, the water pump, and the radiator.
    • Solution: Identify and replace the leaking component(s).
    • Estimated Cost to Fix: $100 - $1000+ depending on the component (parts and labor).
    • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

  • Conductor Plate Failure
    • Description/Symptoms: Harsh shifting, erratic gear changes, transmission stuck in a single gear (limp mode), check engine light.
    • Solution: Replace the conductor plate within the transmission. Requires dropping the transmission pan and replacing the filter.
    • Estimated Cost to Fix: $800 - $1500 (parts and labor).
    • Recalls: None Found
  • Torque Converter Failure
    • Description/Symptoms: Shuddering during acceleration, especially at lower speeds. Possible stalling.
    • Solution: Replace the torque converter.
    • Estimated Cost to Fix: $1500 - $3000 (parts and labor).
    • Recalls: None Found

Suspension

  • Airmatic System Failure
    • Description/Symptoms: Vehicle sagging on one or more corners, failure to maintain ride height, “Visit Workshop” message related to suspension, loud hissing noises.
    • Solution: Diagnose the source of the leak (air struts, air compressor, valve block, or air lines) and replace the faulty component(s).
    • Estimated Cost to Fix: $800 - $2000+ per air strut (parts and labor), $500 - $1200 for the air compressor (parts and labor), $300 - $800 for the valve block (parts and labor).
    • Recalls: None Found
  • ABC (Active Body Control) System Issues (If Equipped)
    • Description/Symptoms: Similar to Airmatic issues, but often with additional symptoms like stiff ride or inability to control body roll. Leaks from hydraulic lines and accumulators are common.
    • Solution: Diagnose and repair the hydraulic leaks. Replace failing accumulators or the ABC pump.
    • Estimated Cost to Fix: Highly variable, depending on the component. $500 - $1500+ per accumulator (parts and labor), $1500-$3000+ for the ABC pump (parts and labor).
    • Recalls: None Found

Electrical

  • Electronic Control Module (ECU) Failure
    • Description/Symptoms: Various engine performance issues, transmission problems, or complete vehicle shutdown. Often accompanied by numerous error codes.
    • Solution: Replace or repair the faulty ECU. May require programming.
    • Estimated Cost to Fix: $1000 - $3000+ (parts, labor, and programming).
    • Recalls: None Found
  • Instrument Cluster Problems
    • Description/Symptoms: Pixelation or fading of the display, intermittent failures, or complete loss of functionality.
    • Solution: Repair or replace the instrument cluster.
    • Estimated Cost to Fix: $500 - $1500 (repair or replacement, parts and labor).
    • Recalls: None Found
  • Battery Drain
    • Description/Symptoms: Dead battery, requiring frequent jump starts. Caused by parasitic draw from faulty modules or electrical components.
    • Solution: Diagnose and eliminate the parasitic draw. Common culprits include the seat control modules, door control modules, and the audio system amplifier.
    • Estimated Cost to Fix: Highly variable, depending on the cause and component. $100 - $500+ for diagnostic and repair time.
    • Recalls: None Found

Exterior

  • Sunroof Issues
    • Description/Symptoms: Sunroof may become stuck open or closed, makes noises, or leaks.
    • Solution: Replace or repair the sunroof motor, realign the sunroof track.
    • Estimated Cost to Fix: $400 - $1000+ (parts and labor).
    • Recalls: None Found
  • Door Lock Actuator Failure
    • Description/Symptoms: Door won’t lock or unlock electronically, requiring manual operation.
    • Solution: Replace the faulty door lock actuator.
    • Estimated Cost to Fix: $300 - $600+ (parts and labor).
    • Recalls: None Found

Interior

  • Seat Control Module Issues
    • Description/Symptoms: Malfunctioning power seats (failure to move in one or more directions), seat memory issues.
    • Solution: Replace or repair the seat control module.
    • Estimated Cost to Fix: $300 - $800+ (parts and labor).
    • Recalls: None Found
  • Command System Malfunctions
    • Description/Symptoms: Navigation system freezing, audio system failures, Bluetooth connectivity problems.
    • Solution: Attempt software updates. If unsuccessful, replace the COMAND unit.
    • Estimated Cost to Fix: $500 - $2000+ (parts and labor).
    • Recalls: None Found

Summary

The 2006 Mercedes-Benz S600 offers a luxurious driving experience with a powerful engine, but its complexity also brings the potential for expensive issues. The most common problems revolve around the air suspension, electrical systems, and the engine’s associated components like coil packs and turbos. Repairs can be costly, especially those involving the Airmatic or ABC systems. Prospective buyers should thoroughly inspect the vehicle and budget accordingly for potential maintenance and repairs. Overall, the severity of the issues can range from minor inconveniences to major mechanical failures, and the cost to fix them can be substantial.

Mercedes-Benz, S600
Mercedes-Benz S600 2006
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