2019 Mercedes-Benz GLS450

The 2019 Mercedes-Benz GLS450 is a luxurious and spacious three-row SUV known for its comfortable ride, advanced technology, and powerful engine. The GLS450 comes standard with a 3.0-liter turbocharged V6 engine producing 362 horsepower and 369 lb-ft of torque, paired with a 9G-TRONIC 9-speed automatic transmission. While appreciated for its opulent interior and smooth ride, some owners have reported experiencing various issues. Some common complaints include electronic glitches, suspension problems, and occasional engine malfunctions. Dislikes often revolve around the high cost of maintenance and repairs, as well as the complexity of the vehicle’s numerous systems. Other engine options include the GLS550’s 4.7-liter twin-turbo V8 producing 449 horsepower and 516 lb-ft of torque, while the high-performance GLS63 AMG boasts a 5.5-liter twin-turbo V8 generating 577 horsepower and 561 lb-ft of torque. All engines are paired with variations of the 9G-TRONIC automatic transmission.

Engine

3.0L Turbocharged V6

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations on the engine, including the valve cover gaskets and the oil filter housing. Symptoms include visible oil leaks, burning oil smell, and low oil level.
  • Solution: Replace the leaking gaskets or seals. In some cases, the entire oil filter housing may need replacement.
  • Estimated Cost to Fix: $200 - $800+
  • Recalls: None Found
• Check Engine Light/Misfires
  • Description/Symptoms: Some owners report experiencing a check engine light accompanied by engine misfires. This can be caused by faulty ignition coils, spark plugs, or fuel injectors.
  • Solution: Diagnose the specific cause of the misfire and replace the faulty component(s).
  • Estimated Cost to Fix: $100 - $500+ per component
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic Transmission

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have reported experiencing rough shifting, hesitation, or jerky gear changes, particularly during low-speed driving or when shifting between gears.
  • Solution: In some cases, a software update or transmission adaptation reset can resolve the issue. In other cases, valve body issues are responsible.
  • Estimated Cost to Fix: $200 - $3,000+
  • Recalls: None Found

Suspension

• Air Suspension Problems
  • Description/Symptoms: The air suspension system, while providing a comfortable ride, can be prone to issues such as air leaks, compressor failure, or faulty sensors. Symptoms include uneven ride height, sagging suspension, or a warning light on the dashboard.
  • Solution: Repair or replace the faulty air struts, compressor, or sensors.
  • Estimated Cost to Fix: $500 - $3,000+ per component
  • Recalls: None Found

Electrical

• MBUX System Glitches
  • Description/Symptoms: The MBUX infotainment system can experience glitches, freezes, or connectivity issues. Some owners have reported problems with the touchscreen, voice control, or navigation system.
  • Solution: Software updates can often resolve these issues. In some cases, the MBUX unit may need to be replaced.
  • Estimated Cost to Fix: $0 (software update) - $1,000+
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Some owners have reported excessive battery drain, leading to difficulty starting the vehicle or a dead battery.
  • Solution: Diagnose the source of the battery drain, which may be a faulty module, accessory, or wiring issue. Repair or replace the faulty component.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Exterior

No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: The panoramic sunroof can experience issues such as difficulty opening or closing, leaks, or unusual noises.
  • Solution: Repair or replace the sunroof motor, seals, or associated components.
  • Estimated Cost to Fix: $200 - $1,500+
  • Recalls: None Found

Summary

The 2019 Mercedes-Benz GLS450, while a luxurious and capable SUV, can be prone to certain issues. Common problems include air suspension malfunctions, MBUX system glitches, and potential engine oil leaks. The severity of these issues can range from minor inconveniences to more costly repairs. Owners should be aware of these potential problems and ensure proper maintenance to mitigate the risk of experiencing them. Repair costs can vary widely depending on the specific issue and the extent of the damage.