2020 Mercedes-Benz GLS580

The 2020 Mercedes-Benz GLS580 is a luxury SUV known for its spaciousness, comfort, and powerful performance. It offers a refined driving experience and a host of advanced technology features. While the GLS580 boasts impressive features, some owners have reported certain issues. The GLS line also offered a GLS450 with a inline-6 turbo engine producing 362 horsepower and 369 lb-ft of torque. There was also the GLS63 AMG that includes a more powerful version of the V8 engine producing 603 horsepower and 627 lb-ft of torque. Common praises include its comfortable ride and luxurious interior, while complaints often cite its complex electronics and high maintenance costs. The GLS580 offers a 4.0L Twin Turbo V8 engine producing 483 horsepower and 516 lb-ft of torque. All engines are mated to the 9G-TRONIC 9-speed automatic transmission.

Engine

4.0L Twin Turbo V8

• M256 Engine Coolant Leaks
  • Description/Symptoms: Coolant leaks may occur from the cylinder head or other engine components. This can lead to overheating and potential engine damage. Common symptoms include low coolant level warnings, visible coolant leaks, and engine overheating.
  • Solution: The source of the coolant leak needs to be identified, and the leaking component (gasket, hose, etc.) needs to be replaced. In some cases, cylinder head replacement may be necessary.
  • Estimated Cost to Fix: $200 - $5,000+ (depending on the source of the leak and repair needed)
  • Recalls: None Found
• Faulty Fuel Injectors
  • Description/Symptoms: Rough idling, misfires, decreased fuel economy, and the check engine light may illuminate.
  • Solution: Replacement of the faulty fuel injector(s).
  • Estimated Cost to Fix: $300 - $1,000+ (depending on how many injectors need replacement).
  • Recalls: None Found

Transmission

9G-TRONIC 9-speed Automatic

• Rough or Jerky Shifting
  • Description/Symptoms: Some owners report experiencing rough or jerky shifting, particularly during low-speed transitions or when downshifting.
  • Solution: In some cases, a software update to the transmission control module (TCM) can resolve the issue. In other cases, replacement of valve body components or, in more severe cases, transmission replacement may be required.
  • Estimated Cost to Fix: $200 (software update) - $7,000+ (transmission replacement)
  • Recalls: None Found
• Transmission Slipping
  • Description/Symptoms: Transmission does not properly engage when accelerating, resulting in slow acceleration and potentially high RPMs.
  • Solution: Replacement of valve body components or, in more severe cases, transmission replacement may be required.
  • Estimated Cost to Fix: $1,000 - $7,000+ (transmission replacement)
  • Recalls: None Found

Suspension

• AIRMATIC Suspension Issues
  • Description/Symptoms: The AIRMATIC air suspension system can experience issues such as air leaks, compressor failure, or sensor malfunction. These issues can result in uneven ride height, a sagging vehicle, or error messages on the dashboard.
  • Solution: Diagnosis of the specific component failure within the AIRMATIC system is required. Replacement of the faulty component, such as the air strut, compressor, or sensor, is typically necessary.
  • Estimated Cost to Fix: $800 - $3,000+ per strut; $500 - $1,500+ for compressor.
  • Recalls: None Found

Electrical

• MBUX System Glitches
  • Description/Symptoms: The Mercedes-Benz User Experience (MBUX) infotainment system can experience glitches such as freezing, lagging, or unexpected restarts. Some owners have also reported issues with voice command recognition.
  • Solution: A software update may resolve some MBUX system glitches. In some cases, replacement of the MBUX system components may be necessary.
  • Estimated Cost to Fix: $0 (software update) - $2,000+ (component replacement)
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: Excessive battery drain can lead to difficulty starting the vehicle or a completely dead battery. This can be caused by a variety of factors, including a faulty alternator, parasitic draw from electrical components, or a failing battery.
  • Solution: Diagnosis of the source of the battery drain is required. Replacement of the faulty component, such as the alternator or battery, or addressing the parasitic draw, is typically necessary.
  • Estimated Cost to Fix: $200 - $1,000+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof may not open or close properly, or may make excessive noise during operation.
  • Solution: Diagnosis of the cause of the sunroof issue, which may involve inspecting the motor, tracks, and seals. Replacement of the faulty component is typically necessary.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Exterior

• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Parking sensors may give false alarms or fail to detect objects, and the blind spot monitoring system might not function correctly.
  • Solution: Individual sensor diagnosis and replacement.
  • Estimated Cost to Fix: $200 - $800+ per sensor
  • Recalls: None Found

Summary

The 2020 Mercedes-Benz GLS580, while a luxurious and powerful SUV, has some common issues that owners have reported. Engine issues, such as coolant leaks and fuel injector problems, can range from minor inconveniences to potentially costly repairs. Transmission issues, like rough shifting or slipping, can also be a concern. Electrical glitches, particularly with the MBUX system, can be frustrating for owners. Suspension and interior issues can also lead to additional expense. Overall, while the GLS580 offers a premium driving experience, potential buyers should be aware of these potential issues and factor them into their ownership considerations. The severity and cost of repairs can vary greatly depending on the specific issue and the extent of the damage.