2023 Mercedes-Benz C300

The 2023 Mercedes-Benz C300 is a luxury sedan known for its elegant design, comfortable interior, and advanced technology. The standard engine is a 2.0-liter turbocharged inline-4 producing 255 horsepower and 295 lb-ft of torque. This engine is paired with a 9G-TRONIC 9-speed automatic transmission. Some owners appreciate the car’s refined ride, quiet cabin, and stylish aesthetics. Common dislikes include the complexity of the infotainment system and the cost of maintenance.

Engine

2.0-Liter Turbocharged Inline-4 (M254)

• Engine Misfires
  • Description/Symptoms: The engine misfires, causing rough idling, hesitation upon acceleration, and the check engine light to illuminate. This issue has been related to faulty ignition coils.
  • Solution: Replace the faulty ignition coil(s).
  • Estimated Cost to Fix: $200 - $500+ (depending on the number of coils replaced)
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Loss of power, unusual whistling or whining noises from the engine bay, and the check engine light coming on.
  • Solution: Replacing the Turbocharger.
  • Estimated Cost to Fix: $2,000 - $3,500+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough or Delayed Shifting
  • Description/Symptoms: Harsh or jerky gear changes, delays when shifting between drive and reverse, or hesitation during acceleration. Some reports indicate it may be related to the valve body.
  • Solution: Valve body replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Suspension

No Issues Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX infotainment system freezes, crashes, or becomes unresponsive.
  • Solution: Software update, or in some cases, replacement of the infotainment unit.
  • Estimated Cost to Fix: $0 (if software update resolves the issue) - $1,500+ (for unit replacement)
  • Recalls: None Found
• Sensor Malfunctions
  • Description/Symptoms: Faulty sensors (such as parking sensors, blind-spot monitoring sensors, or collision avoidance sensors) providing inaccurate readings or failing to function.
  • Solution: Replacement of the faulty sensor.
  • Estimated Cost to Fix: $300 - $800+ (depending on the sensor)
  • Recalls: None Found

Exterior

• Malfunctioning Sunroof/Moonroof
  • Description/Symptoms: Sunroof/moonroof fails to open or close properly, gets stuck, or makes excessive noise during operation.
  • Solution: Repair or replacement of the sunroof/moonroof motor, tracks, or seals.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found

Interior

• Malfunctioning Seat Adjustment Motors
  • Description/Symptoms: Electric seat adjustment motors fail, preventing the seat from moving forward, backward, up, or down.
  • Solution: Replacement of the faulty seat adjustment motor.
  • Estimated Cost to Fix: $300 - $800+
  • Recalls: None Found

Summary:

The 2023 Mercedes-Benz C300 has a mix of potential issues, ranging from minor electrical glitches to more significant engine and transmission concerns. Engine misfires and turbocharger failure appear to be the most serious issues, potentially leading to expensive repairs. Electrical problems with the infotainment system and sensors are also fairly common. While not every C300 will experience these issues, prospective buyers should be aware of these potential problems and ensure thorough inspections and maintenance records are reviewed before purchasing.