2019 Mercedes-Benz SL450

Introduction

The 2019 Mercedes-Benz SL450 is a luxurious roadster that combines performance and comfort. It features a 3.0L twin-turbocharged V6 engine that produces 362 horsepower and 369 lb-ft of torque. The engine is paired with a 9-speed automatic transmission that sends power to the rear wheels.

While the SL450 is a well-built vehicle, it has some reported issues that owners and drivers should be aware of. These issues range in severity and cost, but some can be significant.

Engine

3.0L Twin-Turbocharged V6

• Fuel Injector Failure:
  • Description/Symptoms: Engine misfires, rough idling, decreased fuel economy.
  • Solution: Replace fuel injectors.
  • Estimated Cost to Fix: $1,000 - $2,000+
  • Recalls: None Found
• Turbocharger Wastegate Failure:
  • Description/Symptoms: Loss of power, turbocharger noise, check engine light.
  • Solution: Replace turbocharger wastegate.
  • Estimated Cost to Fix: $1,500 - $2,500+
  • Recalls: None Found

Transmission

9-Speed Automatic

• Torque Converter Shudder:
  • Description/Symptoms: Vibration when accelerating or shifting gears.
  • Solution: Replace torque converter.
  • Estimated Cost to Fix: $2,500 - $3,500+
  • Recalls: None Found

Suspension

• Air Suspension Compressor Failure:
  • Description/Symptoms: Air suspension system malfunctions, causing vehicle to sag or ride unevenly.
  • Solution: Replace air suspension compressor.
  • Estimated Cost to Fix: $1,000 - $1,500+
  • Recalls: None Found

Electrical

• Battery Drain:
  • Description/Symptoms: Battery drains prematurely, causing difficulty starting the vehicle.
  • Solution: Replace battery or identify and repair source of electrical drain.
  • Estimated Cost to Fix: $200 - $500+
  • Recalls: None Found
• Infotainment System Malfunctions:
  • Description/Symptoms: Display screen freezes, audio system issues, navigation errors.
  • Solution: Software update or replacement of infotainment system components.
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found

Exterior

• Convertible Top Issues:
  • Description/Symptoms: Difficulty opening or closing convertible top, leaks, wind noise.
  • Solution: Repair or replace convertible top components.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Interior

• Climate Control Malfunctions:
  • Description/Symptoms: AC or heating system not functioning properly.
  • Solution: Diagnose and repair climate control system components.
  • Estimated Cost to Fix: $500 - $1,000+
  • Recalls: None Found

Summary

The 2019 Mercedes-Benz SL450 is a luxurious and performance-oriented vehicle, but it has some reported issues that can be significant in terms of severity and cost. Engine and transmission issues are relatively common and can be costly to repair. Suspension, electrical, and interior problems can also be encountered. However, many owners report that the SL450 is a reliable and satisfying vehicle when these issues are addressed.