2017 Mercedes-Benz CLS63 AMG S

The 2017 Mercedes-Benz CLS63 AMG S is a high-performance luxury coupe known for its powerful engine, sleek design, and comfortable interior. It has a 5.5-liter twin-turbo V8 engine that produces 577 horsepower and 590 lb-ft of torque. It’s paired with a 7-speed AMG Speedshift MCT transmission. People generally love the car’s performance, styling, and luxurious features. Some common dislikes include its high price tag, potentially high maintenance costs, and the firm ride due to the performance-oriented suspension.

Engine

5.5L Twin-Turbo V8 (M157)

• Oil Leaks
  • Description/Symptoms: Oil leaks can occur from various locations, including the valve cover gaskets, oil filter housing, and rear main seal. Symptoms include visible oil leaks, burning oil smell, and low oil level.
  • Solution: Replacing the leaking gaskets or seals is the typical solution.
  • Estimated Cost to Fix: $200 - $1500+ depending on the location and severity of the leak.
• Turbocharger Issues
  • Description/Symptoms: The turbochargers can experience problems such as wastegate failure, oil leaks, or bearing failure. Symptoms include reduced power, whistling noises, and turbo lag.
  • Solution: Replacing or rebuilding the turbochargers is the fix.
  • Estimated Cost to Fix: $2,000 - $6,000+

Transmission

7-Speed AMG Speedshift MCT

• Rough Shifting
  • Description/Symptoms: Some owners have reported rough or delayed shifts, particularly when cold or during aggressive driving.
  • Solution: A transmission fluid flush and software update may resolve the issue. If the problem persists, valve body replacement may be necessary.
  • Estimated Cost to Fix: $300 - $3,000+ depending on the solution.
• Torque Converter Failure
  • Description/Symptoms: Premature wear or failure of the torque converter can lead to shuddering, slipping, or complete loss of power transfer.
  • Solution: Torque converter replacement is required.
  • Estimated Cost to Fix: $1,500 - $3,500+

Suspension

• Air Suspension Failure (Airmatic)
  • Description/Symptoms: The Airmatic suspension can experience failures in the air struts, compressor, or valve block. Symptoms include the car sitting unevenly, a sagging suspension, and error messages on the dashboard.
  • Solution: Replacing the faulty components is the solution.
  • Estimated Cost to Fix: $800 - $2,500+ per strut; $500 - $1,500 for the compressor.

Electrical

• Battery Drain
  • Description/Symptoms: Some owners have reported issues with excessive battery drain, especially when the car is not driven regularly. This can be caused by parasitic drains from various electrical components.
  • Solution: Diagnosing and repairing the source of the parasitic drain is necessary. This may involve replacing faulty modules or wiring harnesses.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the complexity of the issue.
• Infotainment System Issues (COMAND)
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezing, and connectivity problems.
  • Solution: Software updates may resolve some issues. In other cases, replacement of the COMAND unit may be required.
  • Estimated Cost to Fix: $0 - $2,000+ depending on if the issue requires replacement of the COMAND unit.
• Sensor Failures
  • Description/Symptoms: Various sensors, such as parking sensors, blind spot monitoring sensors, and oxygen sensors, can fail.
  • Solution: Replacing the faulty sensor is the solution.
  • Estimated Cost to Fix: $200 - $800+ per sensor.

Exterior

• No Issues Found

Interior

• No Issues Found

Summary

The 2017 Mercedes-Benz CLS63 AMG S can be a rewarding car to own, but potential buyers should be aware of some common issues. Engine oil leaks, turbocharger problems, transmission issues, air suspension failures, and electrical problems are the most prevalent. The severity and cost of repairs can vary widely, but some repairs can be quite expensive, especially those involving the engine, transmission, or suspension. Due to the age of the vehicles, preventative maintenance is crucial.