2020 Mercedes-Benz OC 500

The 2020 Mercedes-Benz GLC 300 is a popular compact luxury SUV known for its comfortable ride, upscale interior, and abundance of technology. Engine options for the 2020 GLC 300 include a 2.0-liter turbocharged inline-4 engine producing 255 horsepower and 273 lb-ft of torque. This engine is paired with a 9G-TRONIC 9-speed automatic transmission. Owners generally appreciate the GLC 300’s refined driving experience and luxurious features, but some criticisms include the sometimes-hesitant transmission and the complexity of the infotainment system.

Engine

2.0L Turbocharged Inline-4

• Camshaft Adjuster Solenoid Failure
  • Description/Symptoms: Check engine light, rough idle, reduced engine performance, and camshaft position errors.
  • Solution: Replacement of the faulty camshaft adjuster solenoid.
  • Estimated Cost to Fix: $200 - $400+
  • Recalls: None Found
• High Pressure Fuel Pump Failure
  • Description/Symptoms: Extended crank time, check engine light, fuel smell, and potential stalling.
  • Solution: Replacement of the high-pressure fuel pump.
  • Estimated Cost to Fix: $800 - $1500+
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough or Delayed Shifting
  • Description/Symptoms: Harsh shifts between gears, delayed engagement when accelerating, and occasional clunking noises.
  • Solution: Software update or, in more severe cases, valve body replacement.
  • Estimated Cost to Fix: $200 (software) - $2000+ (valve body)
  • Recalls: None Found

Suspension

• Air Suspension Issues (if equipped)
  • Description/Symptoms: Vehicle leaning to one side, ride height not adjusting correctly, and error messages related to the air suspension system. This is only applicable to vehicles equipped with air suspension.
  • Solution: Diagnosis and repair/replacement of the air struts, air compressor, or related components.
  • Estimated Cost to Fix: $800 - $3000+
  • Recalls: None Found

Electrical

• MBUX Infotainment System Glitches
  • Description/Symptoms: System freezing, screen going blank, navigation errors, Bluetooth connectivity problems, and unresponsive touch controls.
  • Solution: Software update or, in some cases, replacement of the MBUX unit.
  • Estimated Cost to Fix: $0 (Software update) - $1500+ (replacement)
  • Recalls: None Found
• Battery Drain
  • Description/Symptoms: Car failing to start after sitting for a short period, warning messages related to low battery voltage.
  • Solution: Diagnosis and repair of parasitic drain on the battery, or replacement of the battery.
  • Estimated Cost to Fix: $150 (Battery) - $500+ (Parasitic Drain Repair)
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Difficulty opening or closing, unusual noises during operation, or water leaks.
  • Solution: Lubrication, adjustment, or replacement of sunroof components.
  • Estimated Cost to Fix: $100 - $800+
  • Recalls: None Found

Interior

• No Issues Found

Summary

The 2020 Mercedes-Benz GLC 300 has a number of potential issues that owners may encounter. The most common issues appear to be related to the MBUX infotainment system and the 9-speed transmission. The cost to repair these issues can vary widely, from minor software updates to expensive component replacements. Air suspension, when equipped, can also be a source of potential issues and costly repairs. While the GLC 300 offers a luxurious driving experience, prospective buyers should be aware of these potential problems.