2004 Mercedes-Benz G55 AMG

The 2004 Mercedes-Benz G55 AMG is a high-performance SUV, known for its rugged capabilities and luxurious appointments. It was exclusively offered with a 5.4L supercharged V8 engine producing 469 horsepower and 516 lb-ft of torque. This engine was paired with a 5-speed automatic transmission. Owners often praise the G55 AMG for its unique styling, off-road prowess, and powerful engine, but also note its high fuel consumption, cumbersome handling, and potential for expensive repairs.

Engine

5.4L Supercharged V8 (M113K)

• Intercooler Pump Failure
  • Description/Symptoms: The intercooler pump, responsible for cooling the air entering the engine, can fail. Symptoms include reduced engine performance, especially during hot weather or under heavy load, and potential overheating.
  • Solution: Replace the intercooler pump.
  • Estimated Cost to Fix: $300 - $600+
  • Recalls: None Found
• Supercharger Clutch Failure
  • Description/Symptoms: The supercharger clutch, that engages the supercharger pulley to the engine, can wear out, causing reduced power and decreased fuel economy. A squealing or grinding noise can also be present.
  • Solution: Replace the supercharger clutch.
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: None Found
• Valve Cover Gasket Leaks
  • Description/Symptoms: The valve cover gaskets can leak oil, leading to a burning smell and potential oil drips.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $400 - $800+
  • Recalls: None Found

Transmission

5-Speed Automatic (722.6)

• Conductor Plate Failure
  • Description/Symptoms: The conductor plate, located inside the transmission, houses sensors and electrical connections. Failure can cause erratic shifting, limp mode (transmission stuck in a single gear), and transmission fault codes.
  • Solution: Replace the conductor plate.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: The valve body controls the flow of transmission fluid to different parts of the transmission. Problems can lead to harsh shifting, slipping between gears, and failure to shift properly.
  • Solution: Rebuild or replace the valve body.
  • Estimated Cost to Fix: $1,000 - $2,500+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure
  • Description/Symptoms: The air suspension compressor, which maintains the ride height, can fail or become weak. Symptoms include sagging suspension, especially overnight, and the compressor running constantly.
  • Solution: Replace the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1800+
  • Recalls: None Found
• Air Suspension Strut Leaks
  • Description/Symptoms: The air struts can develop leaks, causing the suspension to sag and affecting ride quality.
  • Solution: Replace the leaking air struts.
  • Estimated Cost to Fix: $1000 - $2500+ per strut.
  • Recalls: None Found

Electrical

• Central Locking System Malfunctions
  • Description/Symptoms: The central locking system can exhibit issues, such as failure to lock or unlock doors remotely or with the key.
  • Solution: Diagnose and repair or replace faulty components (door lock actuators, control module).
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Window Regulator Failure
  • Description/Symptoms: Power windows may fail to operate due to a malfunctioning window regulator.
  • Solution: Replace the window regulator.
  • Estimated Cost to Fix: $300 - $700+
  • Recalls: None Found

Exterior

• Rust
  • Description/Symptoms: Rust can develop, especially around the door hinges, rocker panels, and around the headlights and taillights.
  • Solution: Repair and repaint affected areas. In severe cases, panel replacement might be necessary.
  • Estimated Cost to Fix: $500 - $5000+ depending on severity.
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: The sunroof mechanism can become stuck, or the motor can fail.
  • Solution: Repair or replace the sunroof motor or mechanism.
  • Estimated Cost to Fix: $400 - $1000+
  • Recalls: None Found

Summary

The 2004 Mercedes-Benz G55 AMG, while desirable for its performance and unique styling, is known to have issues that can be costly to repair. The air suspension is particularly prone to problems, and electrical gremlins can also appear. Engine and transmission issues, while less frequent, can be expensive to address due to the complexity of the components. Rust can also develop, especially in regions with harsh winters. Prospective buyers should thoroughly inspect the vehicle and budget for potential repairs.