2015 Mercedes-Benz GL63 AMG

The 2015 Mercedes-Benz GL63 AMG is a high-performance SUV that blends luxury with powerful performance. It distinguishes itself from the standard GL-Class with its AMG-tuned engine, enhanced styling, and sport-tuned suspension. The GL63 AMG is powered by a hand-built 5.5-liter twin-turbocharged V8 engine, producing 550 horsepower and 561 lb-ft of torque. This engine is paired exclusively with the AMG SPEEDSHIFT PLUS 7G-TRONIC seven-speed automatic transmission. Owners generally appreciate the GL63 AMG’s potent acceleration, luxurious interior, and commanding presence. However, some common complaints revolve around its high running costs, including fuel consumption and maintenance, as well as potential issues related to its complex systems.

Engine

5.5L Twin-Turbocharged V8 (M157)

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various areas, including the valve cover gaskets, oil filter housing, and turbocharger oil lines. Symptoms include visible oil leaks, a burning oil smell, and low oil levels.
  • Solution: Replacing the faulty gaskets or lines. Thorough cleaning of the engine bay is also recommended.
  • Estimated Cost to Fix: $200 - $1,500+ depending on the source and location of the leak.
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Turbochargers can fail due to oil starvation or general wear and tear. Symptoms include reduced engine power, excessive turbo noise (whining or screeching), and potentially check engine lights.
  • Solution: Replacing the faulty turbocharger(s) and addressing the root cause of failure (e.g., oil supply issues).
  • Estimated Cost to Fix: $3,000 - $6,000+ (for both turbos).
  • Recalls: None Found
• Check Engine Light due to Various Sensors
  • Description/Symptoms: The 5.5L engine can be susceptible to issues with various sensors. Symptoms include Check Engine Light, poor fuel economy, or intermittent performance issues.
  • Solution: Scan the OBD system to verify which sensors are faulty and replace.
  • Estimated Cost to Fix: $200-$1000 depending on the sensor.
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT PLUS 7G-TRONIC (722.9)

• Torque Converter Failure
  • Description/Symptoms: The torque converter can fail prematurely, causing issues with gear engagement, slipping, or unusual noises.
  • Solution: Replacing the torque converter.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found
• Valve Body Issues
  • Description/Symptoms: Malfunctions within the valve body can cause harsh or delayed shifting, slipping, or complete loss of gear engagement.
  • Solution: Replacing or rebuilding the valve body.
  • Estimated Cost to Fix: $1,500 - $3,500+
  • Recalls: None Found

Suspension

• AIRMATIC Suspension Failure
  • Description/Symptoms: The AIRMATIC air suspension system is prone to leaks in the air struts or failure of the air compressor. Symptoms include uneven ride height, sagging suspension, and a warning message on the dashboard.
  • Solution: Replacing the faulty air strut(s) or air compressor.
  • Estimated Cost to Fix: $1,000 - $2,500+ per strut; $800 - $1,500+ for the compressor.
  • Recalls: None Found
• Air Suspension Compressor Failure
  • Description/Symptoms: Air compressor failures can be caused by air leaks or internal mechanical issues. Symptoms include uneven ride height, sagging suspension, and a warning message on the dashboard.
  • Solution: Replacing the air suspension compressor.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Excessive battery drain can occur due to various electrical issues, such as a faulty module or a parasitic draw. Symptoms include a dead battery, difficulty starting the vehicle, or intermittent electrical malfunctions.
  • Solution: Diagnosing and repairing the source of the battery drain.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the source of the issue.
  • Recalls: None Found
• Malfunctioning Sensors
  • Description/Symptoms: Various sensors can malfunction, leading to warning lights, inaccurate readings, or system failures.
  • Solution: Replacing the faulty sensor.
  • Estimated Cost to Fix: $100 - $500+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• COMAND System Issues
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, or complete failure.
  • Solution: Software updates or replacement of the COMAND unit.
  • Estimated Cost to Fix: $500 - $2,000+
  • Recalls: None Found

Summary

The 2015 Mercedes-Benz GL63 AMG offers impressive performance and luxury, but ownership can come with potential maintenance challenges. The most prevalent issues relate to the engine (oil leaks and turbocharger problems), transmission (torque converter and valve body issues), and suspension (AIRMATIC system failures). These issues can range in severity from minor inconveniences to major repairs, with costs varying accordingly. Potential buyers should be aware of these common problems and factor them into their ownership budget.