2021 Mercedes-Benz CLA45 AMG

The 2021 Mercedes-Benz CLA45 AMG is a high-performance compact sedan/coupe known for its potent engine and sporty handling. The CLA lineup also includes the CLA250 with a less powerful engine. The CLA45 AMG boasts a hand-built 2.0-liter turbocharged inline-4 engine producing 382 horsepower and 350 lb-ft of torque, paired exclusively with an 8-speed dual-clutch automatic transmission. Owners often praise its blistering acceleration, sharp handling, and stylish design. Some common complaints revolve around the firm ride, limited rear passenger space, and the cost of maintenance and repairs.

Engine

2.0L Turbocharged Inline-4 (M139)

• Excessive Oil Consumption
  • Description/Symptoms: Some owners have reported higher than expected oil consumption, requiring frequent top-ups between oil changes. Symptoms include low oil level warnings and potentially blue smoke from the exhaust.
  • Solution: Monitoring oil levels diligently and addressing any leaks or underlying issues. Some cases may require replacing piston rings or other engine components.
  • Estimated Cost to Fix: $500 - $5,000+ depending on the severity and repair needed.
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Reports of turbocharger failure. Symptoms can include loss of power, unusual noises (whining or screeching) from the engine bay, and potentially check engine light illumination.
  • Solution: Replacement of the turbocharger unit.
  • Estimated Cost to Fix: $2,500 - $4,000+
  • Recalls: None Found

Transmission

8-Speed Dual-Clutch Automatic (DCT)

• Harsh Shifting/Jerking
  • Description/Symptoms: Some owners experience harsh or jerky shifting, particularly at lower speeds or during stop-and-go traffic. This can manifest as a noticeable lurch or hesitation during gear changes.
  • Solution: In some cases, a transmission control module (TCM) software update may resolve the issue. If the problem persists, a more thorough inspection of the transmission components may be required.
  • Estimated Cost to Fix: $150 - $500+ for software updates, $1,000+ for transmission repairs.
  • Recalls: None Found

Suspension

• Stiff Ride Quality
  • Description/Symptoms: The CLA45 AMG is known for its performance-oriented suspension, which can result in a firm and sometimes uncomfortable ride, especially on rough roads.
  • Solution: No direct fix, as this is inherent to the vehicle’s design. Aftermarket suspension components with adjustable damping could potentially improve ride comfort.
  • Estimated Cost to Fix: N/A (inherent characteristic)
  • Recalls: None Found

Electrical

• Infotainment System Glitches
  • Description/Symptoms: Some owners have reported occasional glitches, freezes, or unresponsive behavior with the MBUX infotainment system. This can include issues with navigation, audio, or connectivity features.
  • Solution: Software updates may address some of these issues. A system reset or, in some cases, replacement of the infotainment unit may be necessary.
  • Estimated Cost to Fix: $0 - $500+ for software updates, $1,000+ for unit replacement.
  • Recalls: None Found
• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: Reports of malfunctioning parking sensors or blind-spot monitoring systems. This can result in false alarms or a complete failure of the system.
  • Solution: Diagnosis and replacement of faulty sensors.
  • Estimated Cost to Fix: $200 - $500+ per sensor.
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Rattling/Squeaking Noises
  • Description/Symptoms: Reports of rattling or squeaking noises emanating from various interior trim pieces, particularly in the dashboard, door panels, or rear deck.
  • Solution: Identifying the source of the noise and applying felt pads or other materials to dampen vibrations.
  • Estimated Cost to Fix: Varies, depending on the complexity of the repair.
  • Recalls: None Found

Summary

The 2021 Mercedes-Benz CLA45 AMG, while praised for its performance and styling, does have some reported issues. The engine can suffer from excessive oil consumption and turbocharger failures, which can be costly to repair. The DCT transmission can exhibit harsh shifting. Electrical gremlins in the infotainment system and sensor malfunctions also appear. The stiff suspension is generally considered a characteristic of the vehicle rather than an issue to be fixed.