2021 Mercedes-Benz GLC43 AMG

The 2021 Mercedes-Benz GLC 43 AMG is a performance-oriented compact SUV known for its powerful engine, sporty handling, and luxurious interior. The GLC43 AMG comes standard with a 3.0-liter Bi-Turbo V6 engine that produces 385 horsepower and 384 lb-ft of torque. This engine is paired with a 9G-TRONIC 9-speed automatic transmission. Owners often praise the GLC43 AMG for its exhilarating acceleration and responsive driving dynamics, along with its comfortable and well-appointed cabin. However, some common dislikes include the relatively firm ride quality and the higher running costs associated with a performance vehicle.

Engine

3.0L Bi-Turbo V6

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine, loss of power, check engine light.
  • Solution: Replacement of the turbocharger(s).
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found
• Oil Leaks
  • Description/Symptoms: Oil spots under the vehicle, burning oil smell, low oil level. Common leak locations include the valve cover gaskets and the oil filter housing.
  • Solution: Replacing the leaking gaskets or components.
  • Estimated Cost to Fix: $200 - $1,500+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough Shifting/Hesitation
  • Description/Symptoms: Jerky or delayed shifts, especially between certain gears. Hesitation when accelerating.
  • Solution: Software update, transmission fluid flush, or in some cases, valve body replacement.
  • Estimated Cost to Fix: $300 - $2,000+
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering at low speeds, especially during light acceleration. Can feel like a vibration or hesitation.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $2,000 - $3,500+
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (If Equipped)
  • Description/Symptoms: Vehicle sitting unevenly, air compressor running constantly, suspension warning lights.
  • Solution: Replacing the air struts or the air compressor.
  • Estimated Cost to Fix: $1,000 - $3,000+ per strut; $800 - $1,500+ for the compressor.
  • Recalls: None Found

Electrical

• Infotainment System Freezing/Crashing
  • Description/Symptoms: The MBUX infotainment system freezes, becomes unresponsive, or reboots unexpectedly.
  • Solution: Software update, replacement of the head unit.
  • Estimated Cost to Fix: $0 (software update) - $2,000+ (head unit replacement).
  • Recalls: None Found
• Sensor Failures (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Parking sensors not working, blind spot monitoring system displaying false warnings or not functioning at all.
  • Solution: Replacing the faulty sensor(s).
  • Estimated Cost to Fix: $200 - $800+ per sensor.
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Sunroof not opening or closing properly, unusual noises when operating, water leaks.
  • Solution: Repair or replacement of the sunroof mechanism or seals.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Interior

• Seat Motor Failures
  • Description/Symptoms: Power seats not moving in one or more directions.
  • Solution: Replacing the faulty seat motor.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found
• Rattling/Squeaking Noises
  • Description/Symptoms: Annoying rattles or squeaks coming from various areas of the interior, such as the dashboard, door panels, or seats.
  • Solution: Identifying and securing the source of the noise (clips, fasteners, etc.).
  • Estimated Cost to Fix: Highly variable, depending on the source and complexity.

Summary

The 2021 Mercedes-Benz GLC43 AMG, while praised for its performance and luxury, can be prone to certain issues. Engine problems, particularly with turbocharger failure and oil leaks, can be costly. Transmission issues like rough shifting may require software updates or more substantial repairs. Electrical issues, especially with the infotainment system and sensor failures, are common. Suspension and sunroof issues can also lead to significant repair bills. Overall, while many issues may be minor, some potential repairs can be quite expensive, making it important to have the vehicle thoroughly inspected before purchase and maintain it diligently.