2012 Mercedes-Benz CLS550

The 2012 Mercedes-Benz CLS550 is a luxurious four-door coupe that blends elegant styling with robust performance. It was equipped with a 4.6-liter twin-turbocharged V8 engine, producing 402 horsepower and 443 lb-ft of torque. The CLS550 came standard with a 7-speed automatic transmission. Some owners appreciate its refined ride, powerful engine, and luxurious interior. Common complaints include electrical issues and the high cost of maintenance.

Engine

4.6L Twin-Turbocharged V8

• Oil Leaks
  • Description/Symptoms: Oil leaks from the valve cover gaskets, oil filter housing gasket, or the turbocharger oil lines. Symptoms include visible oil leaks, burning oil smell, and low oil level.
  • Solution: Replace the leaking gaskets or lines.
  • Estimated Cost to Fix: $200 - $1,000+ depending on the location of the leak and labor costs.
  • Recalls: None Found
• Turbocharger Issues
  • Description/Symptoms: Failure of the turbochargers. Symptoms can include reduced engine power, whistling noises, excessive smoke, and engine error codes.
  • Solution: Replacement of the faulty turbocharger.
  • Estimated Cost to Fix: $2,000 - $4,000+ per turbocharger, including labor.
  • Recalls: None Found

Transmission

7-Speed Automatic (7G-Tronic)

• Torque Converter Issues
  • Description/Symptoms: Some owners have reported issues with the torque converter, leading to shuddering during acceleration, erratic shifting, and transmission slipping.
  • Solution: Torque converter replacement.
  • Estimated Cost to Fix: $1,500 - $3,000+
  • Recalls: None Found

Suspension

• Airmatic Suspension Problems
  • Description/Symptoms: The Airmatic suspension system can develop leaks in the air struts or compressor failures. Symptoms include the vehicle sitting low on one or more corners, a noisy air compressor, or a suspension malfunction warning light.
  • Solution: Replacement of the leaking air strut(s) or faulty air compressor.
  • Estimated Cost to Fix: $800 - $2,000+ per strut, $500 - $1,500+ for the compressor, including labor.
  • Recalls: None Found

Electrical

• Battery Drain
  • Description/Symptoms: Excessive battery drain, leading to a dead battery. This can be caused by a faulty module not shutting down properly or parasitic draw from an electrical component.
  • Solution: Diagnose the source of the battery drain and replace the faulty component.
  • Estimated Cost to Fix: $100 - $500+ depending on the complexity of the issue and the part needing replacement, plus diagnostic fees.
  • Recalls: None Found
• COMAND System Malfunctions
  • Description/Symptoms: The COMAND infotainment system can experience glitches, freezes, or complete failure.
  • Solution: Software updates, replacement of the COMAND unit.
  • Estimated Cost to Fix: $100 - $2,000+ depending on the repair needed.
  • Recalls: None Found

Exterior

• Sunroof Issues
  • Description/Symptoms: Sunroof malfunctions, including failure to open or close properly, unusual noises, or leaks.
  • Solution: Repair or replacement of the sunroof motor, track, or seals.
  • Estimated Cost to Fix: $300 - $1,500+
  • Recalls: None Found

Interior

• No Issues Found

Summary

The 2012 Mercedes-Benz CLS550 presents a mix of luxury and performance, but it is important to be aware of potential issues. Common issues include engine oil leaks and turbocharger problems, which can be costly to address. The Airmatic suspension and electrical issues also contribute to potential maintenance expenses. While some repairs are relatively inexpensive, others can be substantial, highlighting the importance of thorough pre-purchase inspections and budgeting for potential repairs.