2017 Mercedes-Benz S63L AMG

The 2017 Mercedes-Benz S63L AMG is a high-performance luxury sedan that boasts a hand-built 5.5-liter twin-turbocharged V8 engine producing 577 horsepower and 664 lb-ft of torque. It offers exhilarating acceleration and a comfortable ride. While praised for its opulent interior, advanced technology, and powerful engine, some owners have reported issues with its complex systems. The S63L AMG exclusively uses the AMG SPEEDSHIFT MCT 7-speed sports transmission. Criticisms often revolve around the high cost of maintenance and repairs.

Engine

5.5L Twin-Turbocharged V8

• Oil Leaks from Turbocharger Oil Lines
  • Description/Symptoms: Oil leaks are observed near the turbochargers. Burning oil smell may be present. Visible oil accumulation on engine components.
  • Solution: Replacement of the turbocharger oil feed and return lines and sealing washers.
  • Estimated Cost to Fix: $800 - $1,500+
  • Recalls: None Found
• Turbocharger Failure
  • Description/Symptoms: Loss of power, unusual noises from the engine bay (whining or screeching), check engine light illuminated, reduced boost pressure.
  • Solution: Replacement of the faulty turbocharger.
  • Estimated Cost to Fix: $3,000 - $6,000+
  • Recalls: None Found

Transmission

AMG SPEEDSHIFT MCT 7-speed Sports Transmission

• Harsh Shifting
  • Description/Symptoms: Abrupt or jerky gear changes, particularly during low-speed driving or when downshifting. Can be more pronounced when the transmission is cold.
  • Solution: Software update of the transmission control module (TCM). If the issue persists, valve body replacement may be required.
  • Estimated Cost to Fix: $200 - $500 (software update), $2,000 - $4,000+ (valve body replacement)
  • Recalls: None Found

Suspension

• AIRMATIC Suspension Compressor Failure
  • Description/Symptoms: The vehicle sits lower than normal, especially on one side. The AIRMATIC warning light illuminates. The compressor may run constantly or not at all.
  • Solution: Replacement of the AIRMATIC compressor. It is recommended to also inspect and replace the relay and air lines.
  • Estimated Cost to Fix: $1,200 - $2,500+
  • Recalls: None Found
• AIRMATIC Strut Leaks
  • Description/Symptoms: Vehicle leans to one side, especially overnight. Hissing sound may be heard near the struts. Ride quality becomes noticeably worse.
  • Solution: Replacement of the leaking AIRMATIC strut.
  • Estimated Cost to Fix: $1,500 - $3,000+ per strut
  • Recalls: None Found

Electrical

• COMAND System Freezing/Crashing
  • Description/Symptoms: The infotainment system (COMAND) becomes unresponsive, freezes, or restarts intermittently. Navigation, audio, and other functions are affected.
  • Solution: Software update of the COMAND system. In some cases, replacement of the COMAND unit may be necessary.
  • Estimated Cost to Fix: $150 - $400 (software update), $1,500 - $3,000+ (COMAND unit replacement)
  • Recalls: None Found
• Battery Drain Issues
  • Description/Symptoms: The battery drains quickly, especially if the car is left unused for a few days. Difficulty starting the engine.
  • Solution: Diagnosis to identify the source of the parasitic drain. Possible causes include faulty modules, aftermarket accessories, or a failing battery.
  • Estimated Cost to Fix: Highly variable depending on the cause. $150 - $300+ for a new battery. $100 - $500+ for diagnostic work.
  • Recalls: None Found

Exterior

• Panoramic Roof Issues
  • Description/Symptoms: The panoramic sunroof may make excessive noise during operation, get stuck, or leak water.
  • Solution: Cleaning and lubrication of the sunroof tracks. Replacement of the sunroof motor or seals may be required.
  • Estimated Cost to Fix: $200 - $800+ (cleaning and lubrication), $500 - $2,000+ (motor or seal replacement)
  • Recalls: None Found

Interior

• Seat Massage Malfunction
  • Description/Symptoms: The multi-contour seat massage function stops working or operates intermittently.
  • Solution: Inspection of the seat massage system components, including the pump, bladders, and wiring. Replacement of faulty components.
  • Estimated Cost to Fix: $300 - $1,000+
  • Recalls: None Found

Summary

The 2017 Mercedes-Benz S63L AMG offers impressive performance and luxury, but owners should be aware of potential issues, particularly with the engine, transmission, suspension, and electrical systems. Repairs can be costly due to the car’s complexity and the price of Mercedes-Benz parts. While some issues are minor, others like turbocharger failure or AIRMATIC suspension problems can result in significant expenses. Prospective buyers should have the vehicle thoroughly inspected by a qualified mechanic before purchase.