2004 Mercedes-Benz CL55 AMG

The 2004 Mercedes-Benz CL55 AMG is a high-performance coupe known for its luxurious features and powerful engine. The CL55 AMG came exclusively with a supercharged 5.4L V8 engine, producing 493 horsepower and 516 lb-ft of torque. This engine was paired with a 5-speed automatic transmission. Owners often praise the car’s robust power, comfortable ride, and elegant design. Common complaints include the high cost of maintenance, potential for expensive repairs, and complex systems that can be prone to failure.

Engine

5.4L Supercharged V8

• Intercooler Pump Failure
  • Description/Symptoms: The intercooler pump circulates coolant through the intercooler to cool the intake air charge. When it fails, the engine may experience a loss of power, especially under heavy acceleration. Overheating may also occur.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets, often resulting in a burning smell as oil drips onto the exhaust manifold.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found
• Supercharger Clutch Issues
  • Description/Symptoms: The supercharger clutch can wear out or fail, resulting in reduced supercharger performance or a complete loss of boost. This can manifest as a noticeable decrease in acceleration.
  • Solution: Replace the supercharger clutch.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Transmission

5-Speed Automatic

• Conductor Plate Failure
  • Description/Symptoms: The conductor plate houses the transmission’s electronic controls. Failure can lead to erratic shifting, limp mode, or complete transmission failure. Diagnostic trouble codes related to solenoids or speed sensors may be present.
  • Solution: Replace the conductor plate and often the filter and fluid.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Problems with the valve body can cause harsh or delayed shifts, slipping, or failure to shift into certain gears.
  • Solution: Rebuild or replace the valve body.
  • Estimated Cost to Fix: $1200 - $2500+
  • Recalls: None Found

Suspension

• ABC (Active Body Control) System Leaks and Malfunctions
  • Description/Symptoms: The ABC system is known for developing leaks in the hydraulic lines, struts, or pump. This can lead to uneven ride height, suspension warning lights, and a stiff or bouncy ride. The pump can also fail.
  • Solution: Repair or replace leaking components, including lines, struts, or the pump. Flush and refill the hydraulic fluid.
  • Estimated Cost to Fix: $500 - $3000+ (depending on the component)
  • Recalls: None Found
• ABC Strut Failure
  • Description/Symptoms: The ABC struts can fail internally, leading to fluid leaks and uneven ride height.
  • Solution: Replace the affected ABC strut(s).
  • Estimated Cost to Fix: $1500 - $3000+ per strut (including labor)
  • Recalls: None Found

Electrical

• Instrument Cluster Pixelation
  • Description/Symptoms: Pixels in the instrument cluster display fade or disappear, making it difficult to read information.
  • Solution: Repair or replace the instrument cluster.
  • Estimated Cost to Fix: $500 - $1200+
  • Recalls: None Found
• SAM (Signal Acquisition Module) Failure
  • Description/Symptoms: SAM modules control various electrical functions. Failure can result in issues with lighting, wipers, door locks, or other electronic systems.
  • Solution: Replace the faulty SAM module and reprogram it.
  • Estimated Cost to Fix: $500 - $1500+
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• No Issues Found

Summary

The 2004 Mercedes-Benz CL55 AMG offers a thrilling driving experience, but owners should be aware of potential issues, particularly with the ABC suspension, engine components like the intercooler pump, and transmission. Repair costs can be high due to the complexity of the vehicle and the specialized parts required. While many owners enjoy the car’s performance and luxury, it’s essential to factor in the potential for significant maintenance expenses when considering purchasing one. The most severe issues are generally related to the ABC suspension and transmission, both of which can be very costly to repair.