2020 Mercedes-Benz GLC43 AMG

The 2020 Mercedes-Benz GLC43 AMG is a performance-oriented compact SUV. It only comes with one engine option, a 3.0L Bi-Turbo V6 producing 385 horsepower and 384 lb-ft of torque. This engine is exclusively paired with a 9G-TRONIC 9-speed automatic transmission. Owners often praise the GLC43 AMG for its powerful engine, sporty handling, and luxurious interior. Common complaints include a firm ride, some outdated infotainment features, and relatively high running costs.

Engine

3.0L Bi-Turbo V6

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine, loss of power, check engine light.
  • Solution: Replacement of the faulty turbocharger(s).
  • Estimated Cost to Fix: $2,500 - $4,500+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Visible oil leaks under the vehicle, burning oil smell, low oil level warning. Primarily observed at the valve cover gaskets and oil filter housing.
  • Solution: Replacement of the leaking gaskets or components.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found
• Fuel Injector Issues
  • Description/Symptoms: Rough idle, misfires, poor fuel economy, check engine light.
  • Solution: Replacement of faulty fuel injectors.
  • Estimated Cost to Fix: $800 - $2,000+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough Shifting
  • Description/Symptoms: Harsh or jerky shifts between gears, especially at lower speeds. Can be accompanied by a clunking noise.
  • Solution: Software update/reprogramming of the transmission control module (TCM). In some cases, valve body replacement might be necessary.
  • Estimated Cost to Fix: $200 - $3,000+
  • Recalls: None Found
• Delayed Engagement
  • Description/Symptoms: A noticeable delay when shifting from Park or Neutral into Drive or Reverse.
  • Solution: Transmission fluid flush/change, or valve body replacement in severe cases.
  • Estimated Cost to Fix: $300 - $3,000+
  • Recalls: None Found

Suspension

• Air Suspension Problems (if equipped)
  • Description/Symptoms: Vehicle sitting unevenly, air compressor failing to inflate the suspension, error messages on the dashboard.
  • Solution: Replacement of faulty air struts, air compressor, or air lines.
  • Estimated Cost to Fix: $1,000 - $3,000+ per strut
  • Recalls: None Found
• Premature Bushing Wear
  • Description/Symptoms: Clunking or squeaking noises from the suspension when going over bumps.
  • Solution: Replacement of worn bushings in the control arms or sway bar links.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX infotainment system becomes unresponsive, freezes, or reboots unexpectedly.
  • Solution: Software update, or replacement of the head unit in severe cases.
  • Estimated Cost to Fix: $0 (Software Update) - $2,000+
  • Recalls: None Found
• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: False alarms, system failures, error messages on the dashboard.
  • Solution: Replacement of faulty sensors.
  • Estimated Cost to Fix: $200 - $800+ per sensor
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: The vehicle’s battery drains quickly, especially when left parked for extended periods. Can be caused by a parasitic draw from a faulty module or accessory.
  • Solution: Diagnosis of the parasitic draw and replacement of the faulty component, or battery replacement.
  • Estimated Cost to Fix: $150 - $1,000+
  • Recalls: None Found

Exterior

• Automatic Liftgate Malfunctions
  • Description/Symptoms: Liftgate not opening or closing properly, getting stuck, or making unusual noises.
  • Solution: Replacement of the liftgate motor, struts, or sensors.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof getting stuck, making excessive noise, or leaking.
  • Solution: Repair or replacement of the sunroof motor, tracks, or seals.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found
• Seat Heater Malfunctions
  • Description/Symptoms: Seat heaters not working, working intermittently, or overheating.
  • Solution: Replacement of faulty seat heater elements or control module.
  • Estimated Cost to Fix: $300 - $800+ per seat
  • Recalls: None Found

Summary

The 2020 Mercedes-Benz GLC43 AMG, while a desirable performance SUV, can be prone to several issues. Engine issues such as turbocharger failure and oil leaks can be costly to repair. Transmission problems like rough shifting and delayed engagement can affect the driving experience. Electrical and suspension issues also contribute to the list of potential problems. Severity ranges from minor annoyances to major mechanical failures, with repair costs potentially reaching several thousand dollars. Prospective buyers should be aware of these common problems and consider a thorough inspection before purchasing.