2017 Mercedes-Benz SL450

The 2017 Mercedes-Benz SL450 is a luxury convertible that offers a powerful V6 engine and a smooth-shifting automatic transmission. The SL450 is praised for its handling, performance, and comfortable interior. However, it also has some potential issues that owners should be aware of.

Engine

• M278 3.0L V6 Biturbo
  • Intake Manifold Failure
    • Description/Symptoms: The intake manifold can crack, causing a loss of power and engine damage.
    • Solution: Replace the intake manifold.
    • Estimated Cost to Fix: $2,000 - $3,000+
    • Recalls: None Found
  • Turbocharger Failure
    • Description/Symptoms: The turbochargers can fail, causing a loss of power and excessive smoke from the exhaust.
    • Solution: Replace the turbochargers.
    • Estimated Cost to Fix: $3,000 - $5,000+
    • Recalls: None Found

Transmission

• 9-Speed Automatic
  • Transmission Shudder
    • Description/Symptoms: The transmission can shudder or vibrate when shifting gears or accelerating.
    • Solution: Reprogram the transmission control module or replace the transmission.
    • Estimated Cost to Fix: $1,000 - $3,000+
    • Recalls: None Found

Suspension

• Air Suspension Failure * Description/Symptoms: The air suspension system can develop leaks or malfunctions, causing the car to ride low or unevenly. * Solution: Repair or replace the air suspension components. * Estimated Cost to Fix: $1,500 - $3,000+ * Recalls: None Found

Electrical

• Battery Drain * Description/Symptoms: The battery can drain quickly, even when the car is not being used. * Solution: Diagnose and repair the cause of the battery drain, such as faulty modules or wiring. * Estimated Cost to Fix: $500 - $2,000+ * Recalls: None Found
• Electrical System Failure * Description/Symptoms: The electrical system can fail, causing various issues such as loss of power, inoperative lights, or dashboard malfunctions. * Solution: Diagnose and repair the faulty components or wiring. * Estimated Cost to Fix: $1,000 - $5,000+ * Recalls: None Found

Exterior

• Convertible Top Issues * Description/Symptoms: The convertible top can malfunction, fail to open or close, or develop leaks. * Solution: Repair or replace the top components or hydraulic system. * Estimated Cost to Fix: $1,500 - $5,000+ * Recalls: None Found

Interior

• Infotainment System Malfunctions * Description/Symptoms: The infotainment system can crash, freeze, or become unresponsive. * Solution: Update the software or replace the infotainment unit. * Estimated Cost to Fix: $500 - $2,000+ * Recalls: None Found
• Climate Control Issues * Description/Symptoms: The climate control system can malfunction, causing uneven temperatures or a lack of heating or cooling. * Solution: Diagnose and repair the faulty components, such as sensors, actuators, or the control module. * Estimated Cost to Fix: $500 - $2,000+ * Recalls: None Found

Overall Summary

The 2017 Mercedes-Benz SL450 is a well-rated luxury convertible, but it does have some potential issues that owners should be aware of. These issues can range in severity from minor inconveniences to major repairs, and the cost to fix them can also vary significantly. It’s important to consider these potential issues before purchasing an SL450 and to factor in the cost of potential repairs into the overall purchase decision.