2020 Mercedes-Benz C63 AMG S

The 2020 Mercedes-Benz C63 AMG S is a performance-oriented version of the C-Class, renowned for its powerful engine and luxurious features. It’s available in sedan, coupe, and cabriolet body styles. The primary engine option is a handcrafted 4.0-liter twin-turbo V8, producing 503 horsepower and 516 lb-ft of torque, paired with a 9-speed AMG SPEEDSHIFT MCT transmission. Drivers appreciate the C63 S for its thrilling acceleration, responsive handling, and premium interior. Common criticisms include the firm ride quality, particularly with the optional performance suspension, and the higher running costs associated with a high-performance vehicle.

Engine

4.0L Twin-Turbo V8

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine bay, loss of power, check engine light.
  • Solution: Replace the faulty turbocharger(s).
  • Estimated Cost to Fix: $3,000 - $6,000+ (depending on whether one or both turbos need replacement and labor rates).
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the car, burning oil smell, low oil level warning. Common leak areas include valve cover gaskets, oil pan gasket, and turbocharger oil lines.
  • Solution: Replace the leaking gasket or seal.
  • Estimated Cost to Fix: $200 - $2,000+ (depending on the location and complexity of the repair).
  • Recalls: None Found

Transmission

9-Speed AMG SPEEDSHIFT MCT

• Rough Shifting/Jerking
  • Description/Symptoms: Harsh or delayed shifts, particularly between certain gears.
  • Solution: Software update for the transmission control module (TCM), or in more severe cases, transmission replacement or rebuild.
  • Estimated Cost to Fix: $150 - $8,000+ (depending on the severity and if the transmission needs to be rebuilt).
  • Recalls: None Found
• Hesitation/Delay Engaging Drive or Reverse
  • Description/Symptoms: Noticeable delay between shifting into drive or reverse and the vehicle moving.
  • Solution: Software update, valve body replacement, or transmission replacement.
  • Estimated Cost to Fix: $150 - $8,000+ (depending on the issue and if the transmission needs to be rebuilt).
  • Recalls: None Found

Suspension

• Air Suspension Failure (If Equipped)
  • Description/Symptoms: Vehicle sagging on one side or corner, suspension warning light illuminated, compressor not running or running constantly.
  • Solution: Replace the faulty air strut, compressor, or air line.
  • Estimated Cost to Fix: $800 - $2,000+ per strut, $500-$1500 for compressor replacement.
  • Recalls: None Found
• Adaptive Damper Malfunction
  • Description/Symptoms: Stiff or unpredictable ride quality, suspension warning light illuminated.
  • Solution: Replace the faulty damper(s).
  • Estimated Cost to Fix: $500 - $1,500+ per damper.
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX system freezes, restarts randomly, or displays error messages.
  • Solution: Software update, replacement of the head unit.
  • Estimated Cost to Fix: $0 - $1,500+ (depending on warranty coverage and if a hardware replacement is needed).
  • Recalls: None Found
• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring, etc.)
  • Description/Symptoms: Faulty sensor readings, warning lights illuminated, systems not functioning correctly.
  • Solution: Diagnose and replace the faulty sensor(s).
  • Estimated Cost to Fix: $200 - $800+ per sensor, depending on location and complexity.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• MBUX Touchpad Issues
  • Description/Symptoms: Touchpad becomes unresponsive or misinterprets inputs.
  • Solution: Software update, or replacement of the touchpad.
  • Estimated Cost to Fix: $0 - $1,200+ (depending on warranty coverage and if a hardware replacement is needed).
  • Recalls: None Found
• Sunroof Malfunction
  • Description/Symptoms: Sunroof gets stuck, makes excessive noise, or fails to close properly.
  • Solution: Repair or replace the sunroof mechanism.
  • Estimated Cost to Fix: $300 - $1,500+.
  • Recalls: None Found

Summary

The 2020 Mercedes-Benz C63 AMG S, while offering impressive performance and luxury, does have some common issues that owners should be aware of. The most significant concerns revolve around the engine (turbocharger failure and oil leaks) and transmission (rough shifting). Electrical glitches within the infotainment system and sensor malfunctions can also occur. The severity and cost of repairs vary, but some issues, like turbocharger replacements or transmission overhauls, can be quite expensive. Potential buyers should consider these potential maintenance costs when evaluating this vehicle.