2020 Mercedes-Benz SLC180

The 2020 Mercedes-Benz SLC180 is a stylish and sporty roadster that offers a blend of luxury and performance. While the SLC range includes other engine options like the SLC200 and SLC300, and the high-performance AMG SLC43, the SLC180 features a 1.6-liter turbocharged inline-4 engine producing around 156 horsepower and 184 lb-ft of torque. Known for its sleek design, retractable hardtop, and comfortable interior, the SLC also has some drawbacks, including a relatively small trunk and some reported issues with certain components. It delivers a pleasant driving experience for most owners, while some report common issues.

Engine

1.6L Turbocharged Inline-4 (M274)

• Oil Leaks
  • Description/Symptoms: Oil leaks are reported, especially around the valve cover gasket and the timing chain cover. Symptoms include visible oil drips, burning oil smell, and low oil levels.
  • Solution: Replacing the valve cover gasket or resealing the timing chain cover.
  • Estimated Cost to Fix: $200 - $800+
• Turbocharger Issues
  • Description/Symptoms: Some owners have reported turbocharger problems, including reduced boost, whistling noises, and potential failure.
  • Solution: Diagnosis and repair or replacement of the turbocharger.
  • Estimated Cost to Fix: $1500 - $3000+

Transmission

9G-Tronic 9-Speed Automatic (725.0)

• Rough Shifting
  • Description/Symptoms: Some owners have reported experiencing rough or jerky shifting, especially between lower gears. In some instances, this is due to faulty valve body, or low transmission fluid.
  • Solution: Check/Replace the transmission fluid, valve body repair/replacement, or transmission software update.
  • Estimated Cost to Fix: $300 - $3000+
• Delayed Engagement
  • Description/Symptoms: A delay in gear engagement when shifting from Park or Neutral into Drive or Reverse.
  • Solution: Diagnosis to determine the root cause; may involve transmission valve body repair, fluid change, or in severe cases, transmission replacement.
  • Estimated Cost to Fix: $500 - $5000+

Suspension

• No Issues Found

Electrical

• Battery Drain
  • Description/Symptoms: Some owners have reported issues with the battery draining quickly, especially if the car is not driven frequently.
  • Solution: Diagnosis to identify the parasitic drain; could be related to the infotainment system, security system, or other electrical components.
  • Estimated Cost to Fix: $100 - $500+
• Infotainment System Glitches
  • Description/Symptoms: The infotainment system may experience glitches, freezes, or connectivity issues.
  • Solution: Software update, system reset, or replacement of the infotainment unit.
  • Estimated Cost to Fix: $100 - $1500+

Exterior

• Retractable Hardtop Malfunctions
  • Description/Symptoms: The retractable hardtop mechanism can sometimes experience malfunctions, such as getting stuck or failing to open/close properly.
  • Solution: Diagnosis and repair of the hardtop mechanism, including checking sensors, hydraulic lines, and motors.
  • Estimated Cost to Fix: $500 - $3000+

Interior

• Sensor Problems
  • Description/Symptoms: Issues with various sensors in the vehicle, such as the rain sensor or parking sensors, can lead to malfunctioning or inaccurate readings.
  • Solution: Replacing the affected sensor.
  • Estimated Cost to Fix: $100 - $500+

Summary

The 2020 Mercedes-Benz SLC180 is a well-regarded roadster, but owners should be aware of potential issues. Engine oil leaks and turbocharger problems can be costly to repair. Additionally, electrical issues, such as battery drain and infotainment system glitches, may require attention. The retractable hardtop mechanism is another area prone to problems. While most issues are relatively minor and infrequent, some can be costly to fix. Prioritizing regular maintenance and addressing issues promptly can help ensure a smooth and enjoyable ownership experience.