2020 Mercedes-Benz GLC63 AMG

The 2020 Mercedes-Benz GLC63 AMG is a performance-oriented compact SUV known for its powerful engine and luxurious features. The GLC63 AMG comes standard with a handcrafted AMG 4.0L V8 biturbo engine that produces 469 horsepower and 479 lb-ft of torque in the standard GLC 63, and 503 horsepower and 516 lb-ft of torque in the GLC 63 S variant. Both models are paired with an AMG SPEEDSHIFT MCT 9-speed automatic transmission. Owners generally appreciate the GLC63 AMG’s blistering acceleration, sharp handling, and upscale interior. Common criticisms include its firm ride, relatively high price tag, and potentially expensive maintenance costs.

Engine

AMG 4.0L V8 Biturbo

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the turbocharger, loss of power, check engine light.
  • Solution: Replacement of the faulty turbocharger.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the vehicle, burning oil smell, low oil level warning. Common leak areas include valve cover gaskets and oil pan gasket.
  • Solution: Replacement of the leaking gasket(s).
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT MCT 9-Speed Automatic

• Rough Shifting
  • Description/Symptoms: Harsh or jerky shifts, especially between lower gears. Can sometimes be resolved with a transmission control module (TCM) update.
  • Solution: TCM software update, or in more severe cases, valve body replacement.
  • Estimated Cost to Fix: $200 (software update) - $3,000+ (valve body replacement)
  • Recalls: None Found

Suspension

• Air Suspension Issues (if equipped)
  • Description/Symptoms: Vehicle sagging on one or more corners, “Ride Height Malfunction” warning light. Potential causes include leaky air struts or a failing air compressor.
  • Solution: Replacement of the faulty air strut or air compressor.
  • Estimated Cost to Fix: $1,500 - $3,000+ per strut, $1,000 - $2,000+ for compressor.
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX infotainment system freezes, becomes unresponsive, or restarts intermittently.
  • Solution: Software update or replacement of the head unit.
  • Estimated Cost to Fix: $0 (software update) - $1,500+ (head unit replacement).
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Issues with parking sensors, blind spot monitoring, or other driver assistance systems.
  • Solution: Replacement of the faulty sensor.
  • Estimated Cost to Fix: $300 - $800+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof gets stuck or makes grinding noises when opening/closing.
  • Solution: Repair or replace sunroof motor or assembly.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Summary

The 2020 Mercedes-Benz GLC63 AMG is a performance SUV with potential reliability concerns, primarily revolving around the engine (turbocharger failures, oil leaks) and transmission (rough shifting). Electrical gremlins within the infotainment system and sensor malfunctions can also occur. While some issues can be resolved with software updates, others may require costly component replacements, such as turbochargers, air suspension components, or valve bodies. Owners should be prepared for potentially higher maintenance costs associated with this high-performance vehicle.