2017 Mercedes-Benz SLC300

The 2017 Mercedes-Benz SLC300 is a stylish and compact roadster that offers a blend of luxury and sporty performance. The SLC300 comes equipped with a 2.0-liter turbocharged inline-4 engine producing 241 horsepower and 273 lb-ft of torque. Other engine options included the AMG SLC43, with a 3.0-liter V6 Biturbo engine, producing 362 horsepower and 384 lb-ft of torque. Both engine options are paired with a 9G-TRONIC 9-speed automatic transmission. Owners generally appreciate the SLC300’s elegant design, nimble handling, and comfortable interior, especially with the retractable hardtop, which allows for open-air driving with the touch of a button. Some common complaints include the limited cargo space and the firm ride, which can be less forgiving on rough roads.

Engine

2.0L Turbocharged Inline-4

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations on the engine, including the valve cover gasket, oil filter housing, or rear main seal. Symptoms include visible oil drips under the car, a burning oil smell, and low oil levels.
  • Solution: The specific source of the leak needs to be identified and the corresponding gasket or seal replaced.
  • Estimated Cost to Fix: $200 - $1,000+, depending on the source and complexity of the repair.
  • Recalls: None Found
• Check Engine Light - Various Causes
  • Description/Symptoms: The check engine light can illuminate due to various issues, including problems with the oxygen sensors, mass airflow sensor, or catalytic converter. A diagnostic scan is required to determine the exact cause.
  • Solution: Repair or replacement of the faulty component, as diagnosed by a mechanic.
  • Estimated Cost to Fix: $100 - $1,500+, depending on the component.
  • Recalls: None Found

Transmission

9G-TRONIC 9-Speed Automatic

• Rough Shifting/Hesitation
  • Description/Symptoms: Some owners have reported experiencing rough or delayed shifting, particularly between certain gears. Hesitation during acceleration may also be present.
  • Solution: In some cases, a software update or transmission adaptation reset can resolve the issue. In more severe cases, valve body replacement or complete transmission replacement may be necessary.
  • Estimated Cost to Fix: $200 (software update) to $5,000+ (transmission replacement).
  • Recalls: None Found

Suspension

• No Issues Found

Electrical

• COMAND System Malfunctions
  • Description/Symptoms: The COMAND infotainment system can experience various glitches, including screen freezes, unresponsive buttons, and Bluetooth connectivity issues.
  • Solution: Software updates may resolve some problems. More significant issues may require replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 (software update) to $2,000+ (COMAND unit replacement).
  • Recalls: None Found
• Sensor Failures (Parking Sensors, etc.)
  • Description/Symptoms: Malfunctioning parking sensors can result in false alarms or failure to detect objects. Other sensors may also fail.
  • Solution: Replacement of the faulty sensor.
  • Estimated Cost to Fix: $150 - $500+ per sensor.
  • Recalls: None Found

Exterior

• Retractable Hardtop Issues
  • Description/Symptoms: The retractable hardtop mechanism can sometimes experience problems, such as getting stuck during operation, making unusual noises, or failing to open or close completely.
  • Solution: Diagnosis and repair of the hardtop mechanism, which may involve lubricating joints, replacing hydraulic components, or realigning the roof panels.
  • Estimated Cost to Fix: $200 - $2,000+, depending on the complexity of the repair.
  • Recalls: None Found

Interior

• No Issues Found

Summary:

The 2017 Mercedes-Benz SLC300 presents a mix of potential issues. Engine oil leaks and electrical issues, particularly related to the COMAND system, are among the more common complaints. Transmission issues, while less frequent, can be costly to address. Retractable hardtop malfunctions can also be a significant concern. The severity and cost of repairs vary widely depending on the specific issue, but owners should be prepared for the possibility of expensive repairs, particularly with the transmission and hardtop mechanisms.