2018 Mercedes-Benz GLC63 AMG

The 2018 Mercedes-Benz GLC63 AMG is a high-performance SUV that blends luxury with exhilarating power. The primary engine option for this model is the hand-built 4.0L Biturbo V8, producing 469 horsepower and 479 lb-ft of torque in the standard GLC63, and 503 horsepower and 516 lb-ft of torque in the GLC63 S. Both models are equipped with the AMG SPEEDSHIFT MCT 9-speed automatic transmission. People rave about the GLC63 AMG’s blistering acceleration, sharp handling, and luxurious interior. However, some owners have noted issues with the infotainment system, air suspension, and the high running costs associated with a performance vehicle.

Engine

4.0L Biturbo V8 (M177)

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine bay, loss of power, check engine light. Some owners report premature turbocharger failure.
  • Solution: Replacement of the faulty turbocharger(s).
  • Estimated Cost to Fix: $4,000 - $8,000+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the vehicle, burning oil smell, low oil level warning. Oil leaks are common from various seals and gaskets, including valve cover gaskets, timing chain cover, and rear main seal.
  • Solution: Replacement of the leaking gaskets and seals.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the location and severity of the leak.
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT MCT 9-Speed Automatic (9G-Tronic)

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or delayed shifts, particularly at lower speeds. Hesitation when accelerating from a stop or low speeds.
  • Solution: Software update of the transmission control module (TCM). In some cases, replacement of valve body or complete transmission rebuild/replacement.
  • Estimated Cost to Fix: $200 - $6,000+ depending on the severity and the solution.
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (AMG Ride Control+)
  • Description/Symptoms: Vehicle sitting unevenly, suspension warning lights, compressor failing, and a bumpy ride.
  • Solution: Replacement of the air struts, compressor, or valve block. Check for leaks in the air lines.
  • Estimated Cost to Fix: $1,500 - $4,000+ depending on the component that needs replacement.
  • Recalls: None Found

Electrical

• Infotainment System Issues (COMAND System)
  • Description/Symptoms: System freezing, screen going black, navigation problems, Bluetooth connectivity issues.
  • Solution: Software update. In some cases, replacement of the COMAND unit.
  • Estimated Cost to Fix: $150 - $2,000+ depending on the solution.
  • Recalls: None Found
• Sensor Failures (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: False alerts, system not functioning, warning lights.
  • Solution: Replacement of the faulty sensor.
  • Estimated Cost to Fix: $200 - $800+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Trim Pieces Loosening/Rattling
  • Description/Symptoms: Rattling noises from door panels, dashboard, or center console. Loose trim pieces around vents or controls.
  • Solution: Re-securing or replacement of the affected trim pieces.
  • Estimated Cost to Fix: $100 - $500+
  • Recalls: None Found

Summary:

The 2018 Mercedes-Benz GLC63 AMG offers thrilling performance, but potential buyers should be aware of potential issues with the turbochargers, oil leaks, air suspension, and infotainment system. Repair costs can be significant, particularly for turbocharger and air suspension repairs. While not every GLC63 AMG will experience these problems, it’s wise to have a pre-purchase inspection performed by a qualified mechanic familiar with AMG models. The severity of issues ranges from minor trim rattles to potentially costly turbocharger or suspension failures.