2015 Mercedes-Benz SL63 AMG

The 2015 Mercedes-Benz SL63 AMG is a high-performance roadster known for its luxurious appointments and thrilling performance. Its handcrafted 5.5-liter biturbo V8 engine generates a robust 577 horsepower and 664 lb-ft of torque, paired with a 7-speed AMG Speedshift MCT transmission. While owners generally praise its exhilarating acceleration, precise handling, and opulent interior, some common complaints involve the car’s complex electronics, air suspension reliability, and relatively high maintenance costs.

Engine

5.5L Biturbo V8

• Oil Leaks from Valve Cover Gaskets
  • Description/Symptoms: Oil leaks are observed around the valve covers, leading to a burning smell and potential oil consumption issues. Visible oil accumulation around the valve cover area.
  • Solution: Replacement of the valve cover gaskets.
  • Estimated Cost to Fix: $500 - $1000+
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Whining noises from the turbochargers, loss of boost pressure, and reduced engine performance. Potential for complete turbocharger failure.
  • Solution: Turbocharger replacement.
  • Estimated Cost to Fix: $3,000 - $6,000+ (for both turbos)
  • Recalls: None Found

Transmission

7-Speed AMG Speedshift MCT

• Rough Shifting/Hesitation
  • Description/Symptoms: Abrupt or delayed gear changes, particularly during downshifts. Hesitation when accelerating from a stop or low speeds.
  • Solution: Transmission fluid flush and potentially software update. In some cases, valve body replacement may be necessary.
  • Estimated Cost to Fix: $300 - $800 (flush and software), $2,000 - $4,000+ (valve body replacement)
  • Recalls: None Found

Suspension

• AIRMATIC Air Suspension Failure
  • Description/Symptoms: The vehicle sags or is unevenly raised, ride comfort is diminished, and warning lights illuminate on the dashboard. Air compressor failure is common.
  • Solution: Replacement of faulty air struts, air compressor, or associated sensors.
  • Estimated Cost to Fix: $1,500 - $3,000+ per strut, $800 - $1,500+ for the compressor
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: The battery frequently drains, especially when the car sits unused for a few days. This can make it difficult to start the vehicle.
  • Solution: Diagnose parasitic drain by testing amp draw on each circuit and replace faulty module or component causing the drain.
  • Estimated Cost to Fix: $200 - $1000+ (depending on source of drain)
  • Recalls: None Found
• COMAND System Issues
  • Description/Symptoms: The central infotainment screen malfunctions, freezes, or reboots unexpectedly. Navigation errors, audio system failures, and Bluetooth connectivity problems can also occur.
  • Solution: Software updates may resolve some issues. In severe cases, replacement of the COMAND unit is necessary.
  • Estimated Cost to Fix: $300-$500 (software), $1,500 - $3,000+ (COMAND unit replacement)
  • Recalls: None Found

Exterior

• Retractable Hard Top Malfunctions
  • Description/Symptoms: The retractable hard top fails to open or close properly, gets stuck midway, or produces unusual noises during operation. This can be due to hydraulic pump failure, sensor issues, or mechanical problems with the folding mechanism.
  • Solution: Diagnose and repair the hydraulic system, replace faulty sensors, or address mechanical issues with the top’s mechanism.
  • Estimated Cost to Fix: $500 - $3,000+ (depending on complexity)
  • Recalls: None Found

Interior

• Seat Control Module Failure
  • Description/Symptoms: The power seats fail to adjust properly, or the memory function stops working. This can be caused by a faulty seat control module.
  • Solution: Replace the seat control module.
  • Estimated Cost to Fix: $500 - $1,200+
  • Recalls: None Found

Summary:

The 2015 Mercedes-Benz SL63 AMG provides excellent power and luxury, but potential buyers should be aware of certain common issues. The air suspension and retractable hardtop can be expensive to repair. Engine oil leaks and transmission issues should be inspected. Electrical problems can also cause issues. Pre-purchase inspections are recommended to identify any existing problems. Due to the high cost of parts and labor, fixing these issues could be expensive.