1999 Mercedes-Benz SL600

Introduction:

The 1999 Mercedes-Benz SL600 is a high-performance luxury convertible powered by a 6.0L V12 engine. It produces 394 horsepower and 413 lb-ft of torque and is paired with a 5-speed automatic transmission. The SL600 was praised for its opulent interior, powerful engine, and sophisticated handling. However, it also had some known issues and concerns.

Engine:

• 6.0L V12:
  • Intake Valve Sticking:
    • Description/Symptoms: Intake valves can become stuck, causing rough idling, reduced power, and engine hesitation.
    • Solution: Replace affected intake valves and clean the intake manifold.
    • Estimated Cost to Fix: $1,200 - $2,500+
    • Recalls: None Found
  • Exhaust Manifold Warping:
    • Description/Symptoms: The exhaust manifolds can warp over time, leading to exhaust leaks and decreased engine performance.
    • Solution: Replace the affected exhaust manifold.
    • Estimated Cost to Fix: $1,000 - $2,000+
    • Recalls: None Found

Transmission:

• 5-Speed Automatic:
  • Shift Solenoid Failure:
    • Description/Symptoms: Faulty shift solenoids can cause erratic shifting, delayed engagement, or complete transmission failure.
    • Solution: Replace the affected shift solenoid.
    • Estimated Cost to Fix: $500 - $1,200+
    • Recalls: None Found

Suspension:

• Airmatic Suspension Failure: * Description/Symptoms: The airmatic suspension system can fail, leading to a lowered ride height, poor handling, and reduced braking performance. * Solution: Replace the air bladders or air compressor. * Estimated Cost to Fix: $2,000 - $4,000+ * Recalls: None Found

Electrical:

• SRS Airbag Module Failure: * Description/Symptoms: The SRS airbag module can malfunction, causing the airbags to deploy unintentionally or not deploy during a crash. * Solution: Replace the SRS airbag module. * Estimated Cost to Fix: $1,000 - $2,000+ * Recalls: None Found
• Battery Discharge: * Description/Symptoms: The battery can discharge prematurely, especially when the vehicle is parked for extended periods. * Solution: Replace the battery or investigate and repair any parasitic electrical draws. * Estimated Cost to Fix: $200 - $500+ * Recalls: None Found

Exterior:

• Plastic Trim Fading: * Description/Symptoms: The plastic trim on the exterior, such as the side mirrors and door handles, can fade and discolor over time. * Solution: Replace or refinish the affected trim pieces. * Estimated Cost to Fix: $500 - $1,500+ * Recalls: None Found

Interior:

• Wood Trim Cracking: * Description/Symptoms: The wood trim on the dashboard and center console can develop cracks and splits. * Solution: Repair or replace the affected wood trim pieces. * Estimated Cost to Fix: $200 - $800+ * Recalls: None Found
• Sunroof Leak: * Description/Symptoms: A clogged sunroof drain can cause water leaks into the cabin. * Solution: Clean the sunroof drain and inspect the sunroof seal for damage. * Estimated Cost to Fix: $100 - $500+ * Recalls: None Found

Summary:

The 1999 Mercedes-Benz SL600 is a powerful and luxurious vehicle, but it has some known issues that can be costly to repair. The intake valve sticking and exhaust manifold warping in the V12 engine, airmatic suspension failure, and SRS airbag module failure are some of the more serious concerns. Other issues, such as fading plastic trim, cracking wood trim, and sunroof leaks, are less severe but can still affect the car’s appearance and comfort. Overall, the SL600 requires proper maintenance and attention to potential issues to ensure its continued performance and reliability.