2014 Mercedes-Benz SL63 AMG

The 2014 Mercedes-Benz SL63 AMG is a high-performance roadster known for its luxurious features and powerful engine. It features a handcrafted 5.5-liter biturbo V8 engine producing 530 horsepower and 590 lb-ft of torque. An optional AMG Performance Package increases output to 557 hp and 664 lb-ft. This engine is paired with an AMG SPEEDSHIFT MCT 7-speed sports transmission. Owners generally praise the car’s exhilarating performance, comfortable ride (despite its sporty nature), and elegant interior. Common dislikes include the high cost of maintenance and repairs, as well as some reported electronic glitches.

Engine

5.5L Biturbo V8

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various points, including the valve cover gaskets, oil filter housing, and turbocharger oil lines. Symptoms include visible oil puddles, burning oil smell, and low oil level warnings.
  • Solution: Replacing the leaking gaskets and seals is the standard repair. For turbo oil lines, replacement is usually required.
  • Estimated Cost to Fix: $200 - $1500+ depending on the leak’s location.
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Whining noises from the engine, reduced power, and potentially engine malfunction lights. Could be caused by an oil supply issue or internal wear.
  • Solution: Replacement of the turbocharger. Inspecting the oil supply lines is critical.
  • Estimated Cost to Fix: $3,000 - $6,000+ per turbocharger.
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT MCT 7-Speed Sports Transmission

• Harsh Shifting/Hesitation
  • Description/Symptoms: Rough or jerky shifts, particularly during downshifts or at lower speeds. Hesitation or delayed engagement when accelerating.
  • Solution: Software updates can sometimes improve shifting behavior. In some cases, valve body replacement or transmission overhaul is required.
  • Estimated Cost to Fix: $300 (software update) - $5,000+ (transmission overhaul).
  • Recalls: None Found

Suspension

• Air Suspension Failure (Airmatic)
  • Description/Symptoms: Vehicle sagging or uneven ride height, particularly after being parked. Air compressor running excessively or failing completely. Suspension warning lights.
  • Solution: Replacing the faulty air struts, air compressor, or air lines.
  • Estimated Cost to Fix: $1,000 - $3,000+ per strut, $500 - $1,500 for the compressor.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: The car may not start after being parked for a short period.
  • Solution: A parasitic draw test can be performed to determine which component is causing the excessive battery drain. Common culprits include the seat control module, door control module, or the COMAND system. Repair or replacement of the offending component.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the source of the drain.
  • Recalls: None Found
• COMAND System Malfunctions
  • Description/Symptoms: The COMAND (Cockpit Management and Data) system, which controls navigation, audio, and other vehicle functions, can experience glitches, freezing, or complete failure.
  • Solution: Software updates or replacement of the COMAND unit.
  • Estimated Cost to Fix: $200 (software update) - $2,000+ (unit replacement).
  • Recalls: None Found
• Convertible Top Issues
  • Description/Symptoms: The convertible top mechanism can experience malfunctions, including slow operation, complete failure to open or close, or error messages on the instrument cluster.
  • Solution: Diagnosing the specific issue, which may involve hydraulic pump replacement, sensor replacement, or repair of the linkage.
  • Estimated Cost to Fix: $500 - $3,000+ depending on the complexity of the repair.
  • Recalls: None Found

Exterior

• Adaptive Headlight Malfunctions
  • Description/Symptoms: Adaptive headlights not adjusting properly, displaying error messages, or failing to illuminate.
  • Solution: Diagnosing and replacing faulty headlight control units or headlight assemblies.
  • Estimated Cost to Fix: $500 - $2,000+ per headlight.
  • Recalls: None Found

Interior

• Seat Motor Issues
  • Description/Symptoms: Power seats failing to adjust properly or making grinding noises during operation.
  • Solution: Replacing faulty seat motors or gears.
  • Estimated Cost to Fix: $300 - $1,000+ per seat.
  • Recalls: None Found

Summary

The 2014 Mercedes-Benz SL63 AMG, while offering exhilarating performance and luxury, can be prone to a variety of issues. The most concerning are potential engine oil leaks and turbocharger failures, which can be costly to repair. Suspension and electrical problems, particularly with the air suspension and COMAND system, are also common. The severity of these issues ranges from minor glitches to major mechanical failures. Due to the complexity and high cost of parts and labor, maintaining this vehicle can be expensive. Potential buyers should carefully inspect the car’s service history and consider a pre-purchase inspection to identify any existing or potential problems.