2014 Mercedes-Benz CLS63 AMG S

The 2014 Mercedes-Benz CLS63 AMG S is a high-performance luxury coupe known for its powerful engine, sleek design, and opulent interior. The CLS63 AMG S features a hand-built 5.5-liter twin-turbocharged V8 engine producing 577 horsepower and 590 lb-ft of torque. It is paired exclusively with a 7-speed AMG Speedshift MCT (Multi-Clutch Technology) transmission. Owners generally praise the car’s immense power, responsive handling, and luxurious appointments. Common complaints include the high cost of maintenance, potential for expensive repairs, and firm ride quality.

Engine

5.5L Twin-Turbocharged V8 (M157)

• Oil Leaks from Valve Cover Gaskets and Oil Filter Housing
  • Description/Symptoms: Visible oil leaks around the valve covers or oil filter housing. Burning oil smell. Low oil level warning.
  • Solution: Replace the valve cover gaskets and/or oil filter housing gasket.
  • Estimated Cost to Fix: $500 - $1500+
• Turbocharger Failure
  • Description/Symptoms: Loss of power, whistling noise from the engine, check engine light.
  • Solution: Replace the failed turbocharger.
  • Estimated Cost to Fix: $3,000 - $6,000+
• Fuel Injector Failure
  • Description/Symptoms: Rough idling, misfires, check engine light, poor fuel economy.
  • Solution: Replace the faulty fuel injector(s).
  • Estimated Cost to Fix: $500 - $2,000+

Transmission

7-Speed AMG Speedshift MCT (Multi-Clutch Technology)

• Rough or Delayed Shifting
  • Description/Symptoms: Harsh or delayed shifts, particularly between lower gears. Slipping during acceleration.
  • Solution: Transmission fluid flush, software update, or valve body replacement. In some cases, complete transmission rebuild or replacement is needed.
  • Estimated Cost to Fix: $300 (fluid flush) - $6,000+ (transmission rebuild/replacement)
• Transmission Mount Failure
  • Description/Symptoms: Excessive vibration, clunking noises during acceleration or deceleration.
  • Solution: Replace the transmission mount.
  • Estimated Cost to Fix: $300 - $600+

Suspension

• Air Suspension Failure (Airmatic)
  • Description/Symptoms: Vehicle sagging on one or more corners, ride height control malfunctions, error messages on the dashboard.
  • Solution: Replace the air struts, air compressor, or valve block.
  • Estimated Cost to Fix: $1,000 - $4,000+ per strut/compressor
• Airmatic Compressor Failure
  • Description/Symptoms: The car won’t lift up after starting it or when you change the drive modes. If the compressor fails, you may get a “car rising slowly” message on the dash.
  • Solution: Replace the compressor.
  • Estimated Cost to Fix: $750 - $1500+

Electrical

• Battery Drain Issues
  • Description/Symptoms: Car battery frequently dies, especially after sitting for a few days.
  • Solution: Diagnose and repair parasitic draw. This could involve replacing a faulty module, fixing wiring issues, or replacing the battery.
  • Estimated Cost to Fix: $100 - $1,000+ (depending on the source of the drain)
• COMAND System Malfunctions
  • Description/Symptoms: The central infotainment screen freezes, reboots randomly, or fails to function altogether.
  • Solution: Software update, replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 - $2,000+

Exterior

• No Issues Found

Interior

• Sunroof Issues
  • Description/Symptoms: Sunroof motor failure, difficulty opening or closing, getting stuck or misaligned.
  • Solution: Repair or replace sunroof motor, realign sunroof.
  • Estimated Cost to Fix: $300 - $1,500+

Recalls

• None Found

Summary

The 2014 Mercedes-Benz CLS63 AMG S offers exhilarating performance and luxurious features but can be prone to certain issues. Engine problems like oil leaks and turbocharger failures can be costly to repair. The air suspension is another potential source of expensive repairs. Electrical issues, such as battery drain and COMAND system malfunctions, can also arise. Potential buyers should be aware of these common issues and factor in the cost of maintenance and potential repairs when considering purchasing this vehicle. Severity of these issues range from minor annoyances to major mechanical failures, with repair costs potentially reaching several thousand dollars.