2021 Mercedes-Benz AMG GT 43

The 2021 Mercedes-Benz AMG GT 43 is a performance-oriented 4-door coupe that blends sporty handling with everyday usability. It features a turbocharged 3.0-liter inline-6 engine with EQ Boost, producing 362 horsepower and 369 lb-ft of torque. Other engine options for the AMG GT 4-Door Coupe include a more powerful version of the same inline-6, as well as a 4.0-liter twin-turbo V8 in higher performance trims. Transmission is the AMG SPEEDSHIFT TCT 9-speed automatic. Owners generally praise its stylish design, agile handling, and comfortable interior. Some criticisms include a firm ride, limited rear headroom, and the complexity of the infotainment system.

Engine

Turbocharged 3.0-liter Inline-6 (M256)

• 48V Mild Hybrid System Issues
  • Description/Symptoms: The 48V mild hybrid system, including the Integrated Starter Generator (ISG), can experience failures leading to warning lights, loss of power, and the inability to start the vehicle. It can also cause inconsistent power delivery.
  • Solution: Diagnosis by a certified Mercedes-Benz technician is required to determine the specific component failure (ISG, battery, or related control module). Replacement of the faulty component is usually necessary. Software updates may also be applied.
  • Estimated Cost to Fix: $2,000 - $6,000+ (depending on the failed component).
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine bay, loss of power, check engine light.
  • Solution: Replacement of the turbocharger.
  • Estimated Cost to Fix: $3,000 - $5,000+
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT TCT 9-speed Automatic (9G-Tronic)

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or jerky shifts, especially during low-speed acceleration. Hesitation or delayed engagement when shifting between drive and reverse.
  • Solution: Software update, transmission fluid flush, or valve body replacement.
  • Estimated Cost to Fix: $300 - $3,000+ (depending on the complexity of the repair)
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (If Equipped)
  • Description/Symptoms: Uneven ride height, vehicle sagging on one side, warning lights on the dashboard, compressor noise, harsh ride.
  • Solution: Diagnosis of the air suspension system to identify leaks in the air struts, malfunctioning compressor, or faulty control module. Replacement of the affected components.
  • Estimated Cost to Fix: $1,000 - $4,000+ (depending on the component needing replacement).
  • Recalls: None Found

Electrical

• MBUX Infotainment System Glitches
  • Description/Symptoms: Freezing, lagging, unexpected reboots, unresponsive touchscreen, connectivity issues (Bluetooth, Apple CarPlay, Android Auto), and navigation errors.
  • Solution: Software updates are the first course of action. In more severe cases, the head unit or related control modules may need to be replaced.
  • Estimated Cost to Fix: $0 (for software updates) to $2,000+ (for hardware replacement)
  • Recalls: None Found
• Sensor Failures
  • Description/Symptoms: Malfunctioning sensors such as parking sensors, blind spot monitoring sensors, and adaptive cruise control sensors can cause error messages, false warnings, and loss of functionality.
  • Solution: Diagnosis to identify the faulty sensor and replacement.
  • Estimated Cost to Fix: $200 - $1,000+ (depending on the sensor and labor).
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof/Moonroof Issues
  • Description/Symptoms: Squeaking, rattling, or failure to open or close properly. Water leaks around the sunroof seal.
  • Solution: Lubrication of the sunroof tracks, adjustment of the sunroof mechanism, replacement of the sunroof seal, or replacement of the entire sunroof assembly.
  • Estimated Cost to Fix: $100 - $2,000+ (depending on the complexity of the issue).
  • Recalls: None Found

Summary

The 2021 Mercedes-Benz AMG GT 43, while offering a blend of performance and luxury, appears to have potential issues ranging from mild inconveniences to more significant and costly repairs. The most concerning issues revolve around the engine’s mild hybrid system, transmission performance, and the complexity of the electrical systems. While some issues may be resolved with software updates, others could require substantial repairs. Potential buyers should be aware of these potential problems and consider a thorough inspection before purchasing.