2018 Mercedes-Benz CLS63 AMG S

The 2018 Mercedes-Benz CLS63 AMG S is a high-performance luxury coupe known for its powerful engine and sleek design. It comes exclusively with a handcrafted 5.5-liter twin-turbocharged V8 engine producing 577 horsepower and 590 lb-ft of torque, paired with an AMG Speedshift MCT 7-speed automatic transmission. Owners often praise its exhilarating performance, luxurious interior, and distinctive styling, but some have noted concerns about its running costs and complex electronics.

Engine

5.5L Twin-Turbocharged V8 (M157)

• Turbocharger Failure
  • Description/Symptoms: Whining noise from the engine, loss of power, check engine light.
  • Solution: Replace the faulty turbocharger(s).
  • Estimated Cost to Fix: $3,000 - $6,000+ per turbocharger (parts and labor).
  • Recalls: None Found
• Oil Leaks (Valve Cover Gaskets/Oil Filter Housing)
  • Description/Symptoms: Visible oil leaks on the engine, burning oil smell, low oil level.
  • Solution: Replace the valve cover gaskets and/or oil filter housing gasket.
  • Estimated Cost to Fix: $500 - $1,500+
  • Recalls: None Found
• Fuel Injector Failure
  • Description/Symptoms: Engine misfires, rough idling, poor fuel economy, check engine light.
  • Solution: Replace the faulty fuel injector(s).
  • Estimated Cost to Fix: $800 - $2,000+ (depending on how many injectors)
  • Recalls: None Found

Transmission

AMG Speedshift MCT 7-Speed Automatic

• Rough Shifting/Hesitation
  • Description/Symptoms: Harsh or delayed shifts, particularly during acceleration or deceleration.
  • Solution: Perform transmission service (fluid and filter change), software update, or valve body replacement.
  • Estimated Cost to Fix: $300 - $4,000+
  • Recalls: None Found
• Torque Converter Issues
  • Description/Symptoms: Shuddering at low speeds, particularly when the transmission is locking and unlocking the torque converter.
  • Solution: Replace torque converter.
  • Estimated Cost to Fix: $2,000 - $4,000+
  • Recalls: None Found

Suspension

• Air Suspension Malfunctions (Airmatic)
  • Description/Symptoms: Vehicle sagging on one or more corners, “Visit Workshop” message on the dashboard, compressor failure.
  • Solution: Replace the faulty air strut(s) or air compressor.
  • Estimated Cost to Fix: $1,000 - $3,000+ per strut, $800 - $2,000+ for the compressor.
  • Recalls: None Found

Electrical

• Battery Drain Issues
  • Description/Symptoms: Dead battery after sitting for a short period, difficulty starting the vehicle.
  • Solution: Diagnose and repair the parasitic draw, replace the battery.
  • Estimated Cost to Fix: $150 - $800+ depending on cause.
  • Recalls: None Found
• COMAND System Problems
  • Description/Symptoms: Freezing, lagging, or malfunctioning COMAND system (navigation, audio, etc.).
  • Solution: Software update, or replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 - $3,000+
  • Recalls: None Found

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof gets stuck, makes grinding noises, or fails to open/close properly.
  • Solution: Lubricate sunroof tracks, repair or replace sunroof motor or mechanism.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Summary The 2018 Mercedes-Benz CLS63 AMG S is a powerful and luxurious vehicle, but owners should be aware of potential issues, particularly with the engine, transmission, air suspension, and electronics. The severity and cost of repairs can vary widely, with some issues being relatively minor and others requiring significant investment. Preventative maintenance and regular inspections are crucial to minimize the risk of major problems.