2021 Mercedes-Benz GLC300e

The 2021 Mercedes-Benz GLC300e is a plug-in hybrid SUV offering a blend of luxury and efficiency. It features a 2.0-liter turbocharged four-cylinder engine paired with an electric motor, producing a combined 315 horsepower and 516 lb-ft of torque. Other available engines in the 2021 GLC lineup include a non-hybrid 2.0-liter turbo four (GLC300) and a more powerful AMG-enhanced 3.0-liter V6 (GLC43) and 4.0-liter V8 (GLC63). Owners often praise the GLC300e for its comfortable ride, luxurious interior, and fuel efficiency in hybrid mode. Common complaints include the relatively small all-electric driving range and the higher price point compared to non-hybrid models.

Electric Motor

• Electric Motor Issues

  • Description/Symptoms: Some owners have reported instances where the electric motor would unexpectedly shut off, resulting in a sudden loss of power and a switch to the gasoline engine. The vehicle may display a “Drive System Malfunction” error message.
  • Solution: Diagnosis may involve checking the electric motor’s wiring harness, the high-voltage battery pack, and the motor control module. Replacement of a faulty component, such as the motor control module or a damaged wiring harness, can resolve the issue.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the failed part.
  • Recalls: None Found

Electrical

• MBUX System Freezing/Crashing
  • Description/Symptoms: The Mercedes-Benz User Experience (MBUX) infotainment system occasionally freezes, becomes unresponsive, or reboots unexpectedly. This can affect navigation, audio, and climate control functions.
  • Solution: A software update from the dealership can often resolve these issues. In some cases, a complete system reset or replacement of the MBUX unit may be necessary.
  • Estimated Cost to Fix: $0 (software update) - $1,500+ (MBUX unit replacement)
  • Recalls: None Found
• 12V Battery Drain
  • Description/Symptoms: Premature draining of the 12V battery, leading to starting problems or electronic malfunctions. This may be caused by parasitic draws from various electronic components.
  • Solution: Diagnosis to identify the source of the parasitic draw. Replacement of the faulty component or installation of a battery maintainer may be required.
  • Estimated Cost to Fix: $150 - $500+
  • Recalls: None Found

Interior

• Creaking/Rattling Noises
  • Description/Symptoms: Annoying creaking or rattling noises emanating from the dashboard, door panels, or rear cargo area while driving, especially on uneven surfaces.
  • Solution: Locating the source of the noise and applying felt tape, foam padding, or tightening loose fasteners. Dealership service may be required for more complex issues.

  • Estimated Cost to Fix: $50 - $300+ depending on the complexity

  • Recalls: None Found

Exterior

• Sensor Malfunctions (Parking Sensors, Blind Spot Monitoring)
  • Description/Symptoms: False alarms or failures of parking sensors or blind spot monitoring systems. This can be caused by sensor damage, misalignment, or software glitches.
  • Solution: Inspection and cleaning of sensors. Realignment or replacement of faulty sensors. Software update.
  • Estimated Cost to Fix: $200 - $800+ per sensor or system
  • Recalls: None Found

Summary The 2021 Mercedes-Benz GLC300e, while generally reliable, has a few common issues to be aware of. The most potentially serious is the electric motor malfunction, which can lead to loss of power, though less common. Other issues such as electrical glitches, interior noises, and sensor malfunctions are also reported. The cost of repair can vary widely, from relatively inexpensive fixes to potentially significant expenses for electrical or electronic component replacements. Overall, the GLC300e offers a luxurious and efficient driving experience but prospective buyers should carefully inspect the vehicle and be aware of these potential problem areas.