2018 Mercedes-Benz SL450

Introduction

The 2018 Mercedes-Benz SL450 is a grand touring roadster that offers a thrilling driving experience. It comes equipped with a twin-turbocharged 3.0L V6 engine that produces 362 horsepower and 369 lb-ft of torque, paired with a 9G-TRONIC 9-speed automatic transmission. The SL450 boasts a retractable hardtop roof, allowing for open-air driving at the touch of a button. It is praised for its luxurious interior, refined handling, and powerful engine, but some owners have reported issues with various components.

Engine

• 3.0L V6 Twin-Turbocharged

  • Turbocharger Failure
    • Description/Symptoms: Reduced engine power, strange noises coming from the engine, increased oil consumption
    • Solution: Replace the affected turbocharger and associated components
    • Estimated Cost to Fix: $2,500 - $4,000+
    • Recalls: None Found
  • Intake Valve Carbon Buildup
    • Description/Symptoms: Reduced engine performance, rough idling, decreased fuel efficiency
    • Solution: Clean the intake valves and associated components
    • Estimated Cost to Fix: $500 - $1,000+
    • Recalls: None Found

Transmission

• 9G-TRONIC 9-Speed Automatic

  • Transmission Slipping
    • Description/Symptoms: Difficulty shifting gears, loss of power while driving
    • Solution: Replace or repair the transmission components, such as the valve body or torque converter
    • Estimated Cost to Fix: $2,000 - $5,000+
    • Recalls: None Found

Suspension

• Air Suspension Malfunction * Description/Symptoms: Uneven suspension height, reduced ride comfort, warning messages on the dashboard * Solution: Replace the faulty air suspension components, such as the air springs or compressor * Estimated Cost to Fix: $1,500 - $3,000+ * Recalls: None Found

Electrical

• Battery Drain * Description/Symptoms: Battery dies prematurely, difficulty starting the vehicle * Solution: Replace the battery or identify and resolve the electrical drain * Estimated Cost to Fix: $200 - $1,000+ * Recalls: None Found
• Electrical Control Unit Failure * Description/Symptoms: Various electrical system malfunctions, such as inoperative power windows, headlights, or infotainment system * Solution: Replace the affected electrical control unit * Estimated Cost to Fix: $500 - $2,000+ * Recalls: None Found

Exterior

• Convertible Top Malfunction * Description/Symptoms: Difficulty opening or closing the retractable hardtop roof, leaks or wind noise * Solution: Repair or replace the convertible top mechanism, such as the hydraulic cylinders or motor * Estimated Cost to Fix: $1,000 - $5,000+ * Recalls: None Found

Interior

• Infotainment System Lag * Description/Symptoms: Slow response, freezing, or crashing of the infotainment system * Solution: Update the system software or replace the head unit * Estimated Cost to Fix: $200 - $1,000+ * Recalls: None Found
• Navigation System Errors * Description/Symptoms: Incorrect navigation guidance, difficulty finding destinations * Solution: Update the navigation system software * Estimated Cost to Fix: $100 - $500+ * Recalls: None Found

Summary

While the 2018 Mercedes-Benz SL450 offers impressive performance and luxury, some owners have encountered issues with various components. These issues range in severity and cost, with some being minor inconveniences and others requiring major repairs. It’s important to consider these potential issues before purchasing or maintaining this vehicle.