2009 Mercedes-Benz G550

The 2009 Mercedes-Benz G550 is a rugged and luxurious SUV known for its off-road capabilities and iconic design. The G550 came equipped with a 5.5-liter V8 engine, producing 382 horsepower and 391 lb-ft of torque, paired with a 7-speed automatic transmission. While praised for its powerful engine, luxurious interior, and distinctive styling, the G550 is often criticized for its poor fuel economy, cumbersome handling, and high price tag.

Engine

5.5L V8

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: The engine may experience rough idling, misfires, or a check engine light. This can be caused by a faulty camshaft adjuster solenoid, preventing proper oil pressure to the camshafts.
  • Solution: Replace the faulty camshaft adjuster solenoid.
  • Estimated Cost to Fix: $300 - $600+
• Valve Cover Gasket Leaks
  • Description/Symptoms: Oil leaks are common around the valve cover gaskets, leading to a burning smell and potential oil consumption.
  • Solution: Replace the valve cover gaskets.
  • Estimated Cost to Fix: $400 - $800+

Transmission

7-Speed Automatic (7G-Tronic)

• Torque Converter Issues
  • Description/Symptoms: Shuddering or vibrations, especially during low-speed acceleration. Can be caused by internal torque converter failure.
  • Solution: Torque converter replacement or transmission rebuild.
  • Estimated Cost to Fix: $2,500 - $5,000+
  • Recalls: None Found
• Valve Body Failure
  • Description/Symptoms: Harsh or delayed shifting, slipping between gears, or getting stuck in a gear. This is often due to the valve body experiencing failure.
  • Solution: Replace or rebuild the valve body.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure
  • Description/Symptoms: The vehicle sits lower than normal or one side is noticeably lower. The air suspension compressor may be running constantly or not at all. It can also cause a warning light on the dash.
  • Solution: Replace the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Air Strut Leaks
  • Description/Symptoms: Hissing sound from the suspension, especially after the vehicle has been sitting. The vehicle may sag overnight or take a long time to level itself.
  • Solution: Replace the leaking air strut(s).
  • Estimated Cost to Fix: $1,200 - $2,500+ per strut.
  • Recalls: None Found

Electrical

• Heater Core Issues
  • Description/Symptoms: The vehicle might have a leaky heater core, causing coolant to spill in the cabin and potentially causing electrical issues.
  • Solution: Replacing the heater core.
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The vehicle’s battery may drain quickly, especially when left unattended for extended periods. This can be due to parasitic draws from various electronic components.
  • Solution: Diagnose and repair the source of the parasitic draw. This can involve testing individual circuits and components.
  • Estimated Cost to Fix: $100 - $500+

Exterior

• Rust
  • Description/Symptoms: This is a common issue on older G-Wagens. Rust can appear in various places, like on the fenders, door panels, etc.
  • Solution: Cut out the rust and weld in new pieces.
  • Estimated Cost to Fix: $500-$3,000+
  • Recalls: None Found

Interior

• Sunroof Malfunction
  • Description/Symptoms: The sunroof may be stuck open, closed, or only opens/closes partially. The motor may be weak, or the mechanism may be damaged.
  • Solution: Repair or replace the sunroof motor or mechanism.
  • Estimated Cost to Fix: $300 - $1,000+

Summary

The 2009 Mercedes-Benz G550, while a capable and luxurious SUV, has a number of potential issues that owners should be aware of. Engine problems like camshaft adjuster solenoid failure and valve cover gasket leaks can lead to moderate repair costs. Transmission issues, particularly with the torque converter and valve body, can be more expensive to address. Suspension problems, such as air suspension compressor failure and air strut leaks, are also common and can result in significant repair bills. Electrical issues can range from minor to major, with battery drain and sunroof malfunctions being typical concerns. Finally, rust can be a significant issue on older G-Wagens, depending on environmental factors. Overall, potential buyers should factor in these potential repair costs when considering a 2009 G550.