2019 Mercedes-Benz C43 AMG

The 2019 Mercedes-Benz C43 AMG is a performance-oriented version of the C-Class sedan, coupe, and convertible. It is powered by a 3.0-liter twin-turbocharged V6 engine producing 385 horsepower and 384 lb-ft of torque, paired with a 9G-Tronic 9-speed automatic transmission. Some owners love the C43 AMG for its blend of performance and luxury, its sporty handling, and its updated styling for the 2019 model year. Common complaints include a somewhat firm ride, especially on rough roads, and the infotainment system can be complex to use. Other engine options available on the C-Class include a 2.0L Turbocharged Inline-4, a 3.0L Turbocharged V6 (C43 AMG), a 4.0L Turbocharged V8 (C63 AMG), and a plug-in hybrid option.

Engine

3.0L Twin-Turbocharged V6

• Coolant Leak from Turbocharger Coolant Line
  • Description/Symptoms: Coolant leak, typically a small leak, near the turbocharger area. Can cause a coolant smell and eventually low coolant levels.
  • Solution: Replacing the turbocharger coolant line. Some owners replace with aftermarket lines for improved durability.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found
• Oil Leaks from Valve Cover Gaskets
  • Description/Symptoms: Oil leaks around the valve covers, leading to oil consumption and potential burning smell.
  • Solution: Replacement of the valve cover gaskets.
  • Estimated Cost to Fix: $400 - $1000+
  • Recalls: None Found

Transmission

9G-Tronic 9-Speed Automatic (725.0)

• Rough or Delayed Shifting
  • Description/Symptoms: Hesitation or jerky shifts, particularly between lower gears. Sometimes a noticeable clunking sound.
  • Solution: A software update or a complete replacement of the conductor plate within the valve body. Some instances may require a valve body replacement.
  • Estimated Cost to Fix: $200 (Software Update) - $2000+ (Valve Body Replacement)
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (if equipped)
  • Description/Symptoms: Vehicle sitting unevenly, air compressor failing to engage, error messages related to the air suspension system. More common on models with air suspension.
  • Solution: Replacing the air struts, air compressor, or ride height sensors.
  • Estimated Cost to Fix: $800 - $2500+ per corner/component
  • Recalls: None Found

Electrical

• Infotainment System Freezing or Rebooting
  • Description/Symptoms: The MBUX system freezes, becomes unresponsive, or reboots unexpectedly.
  • Solution: Software updates can resolve some issues, but sometimes the head unit needs to be replaced.
  • Estimated Cost to Fix: $0 (Software Update) - $1500+ (Head Unit Replacement)
  • Recalls: None Found
• Sensor Failures (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Parking sensors failing to detect objects, blind spot monitoring system not working correctly, error messages displayed.
  • Solution: Replacing the faulty sensor.
  • Estimated Cost to Fix: $200 - $500+ per sensor
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: The battery drains quickly, especially if the car is left for extended periods. Can be related to faulty modules not shutting down properly.
  • Solution: Diagnosing the parasitic drain and replacing the faulty module or battery.
  • Estimated Cost to Fix: $150 - $500+ (Diagnostic) + cost of parts.
  • Recalls: None Found

Exterior

• LED Taillight Failures
  • Description/Symptoms: Sections of the LED taillights failing to illuminate.
  • Solution: Replacement of the taillight assembly.
  • Estimated Cost to Fix: $400 - $800+ per taillight
  • Recalls: None Found

Interior

• Sunroof Issues (Noise, Malfunction)
  • Description/Symptoms: The sunroof makes excessive noise when opening or closing, or it fails to open or close completely.
  • Solution: Lubricating the sunroof tracks, replacing the sunroof motor, or replacing the entire sunroof assembly.
  • Estimated Cost to Fix: $100 - $1500+
  • Recalls: None Found

Summary

The 2019 Mercedes-Benz C43 AMG experiences a range of potential issues, from relatively minor sensor failures to more significant engine and transmission problems. The most concerning and potentially costly issues involve the engine coolant and oil leaks, transmission rough shifting, and air suspension malfunctions (if equipped). Electrical issues, especially with the infotainment system, are also common. While most issues are not considered catastrophic, the repair costs can be significant due to the complexity of the vehicle and the cost of Mercedes-Benz parts.