2014 Mercedes-Benz CLS63 AMG

The 2014 Mercedes-Benz CLS63 AMG is a high-performance luxury sedan that blends sleek coupe-like styling with impressive power and technology. Other engine options for the 2014 CLS lineup included the CLS550 with a 4.7L biturbo V8, and the CLS400/CLS500 which was available in other markets. The CLS63 AMG is powered by a hand-built 5.5-liter biturbo V8 engine producing 577 horsepower and 590 lb-ft of torque. All engine options are paired with a 7-speed automatic transmission. Owners generally praise the CLS63 AMG for its exhilarating performance, luxurious interior, and distinctive design. Criticisms often revolve around its high maintenance costs, firm ride (despite the air suspension), and complex electronics that can be prone to issues.

Engine

5.5L Biturbo V8 (M157)

• Oil Leaks from Valve Cover Gaskets and/or Oil Filter Housing
  • Description/Symptoms: Oil leaks can appear on the engine block, often accompanied by a burning oil smell. A low oil level warning light may also illuminate.
  • Solution: Replacing the valve cover gaskets and/or oil filter housing gasket to reseal the engine.
  • Estimated Cost to Fix: $500 - $1,500+ depending on the severity and shop.
• Turbocharger Failure
  • Description/Symptoms: Whining noises from the engine bay, loss of power, and potential for excessive oil consumption.
  • Solution: Replacing the failed turbocharger(s).
  • Estimated Cost to Fix: $3,000 - $7,000+ depending on if one or both turbos need replacement.
• Direct Injector Failure
  • Description/Symptoms: Rough idling, misfires, decreased fuel economy, and a check engine light.
  • Solution: Replacing the faulty direct fuel injector(s).
  • Estimated Cost to Fix: $500 - $2,000+, varying depending on the number of injectors that need replacement.

Transmission

AMG SPEEDSHIFT MCT 7-Speed Automatic

• Harsh Shifting/Hesitation
  • Description/Symptoms: The transmission may exhibit rough or jerky shifts, especially during low-speed operation. Hesitation can occur when accelerating.
  • Solution: A transmission service including fluid and filter replacement. In some cases, more in-depth repairs like valve body replacement may be required.
  • Estimated Cost to Fix: $300 - $3,000+, depending on the severity and complexity.
• Transmission Slipping
  • Description/Symptoms: The engine may rev high, but the vehicle doesn’t accelerate as expected. The transmission may also slip out of gear.
  • Solution: Diagnosis of the transmission to determine the cause of the slipping. Could be fluid level, sensor, solenoid, or the whole transmission.
  • Estimated Cost to Fix: $100 - $7,000+ depending on the fix and what is wrong.

Suspension

• Air Suspension Failure (AIRMATIC)
  • Description/Symptoms: The vehicle may sag on one or more corners, the ride height may be uneven, or the air compressor may run constantly. Error messages related to the air suspension may appear on the dashboard.
  • Solution: Replacing faulty air struts, air compressor, or air lines.
  • Estimated Cost to Fix: $800 - $2,500+ per corner for struts. Compressor replacement $800-$1500+

Electrical

• Battery Drain Issues
  • Description/Symptoms: The battery frequently dies, especially if the car sits for a few days.
  • Solution: Diagnosing the source of the parasitic drain. Could be a faulty module, sensor, or aftermarket accessory.
  • Estimated Cost to Fix: $100 - $1,000+ depending on the complexity of the issue.
• Malfunctioning Sensors
  • Description/Symptoms: Various warning lights illuminate on the dashboard due to faulty sensors (e.g., oxygen sensors, wheel speed sensors). The car may exhibit poor performance or safety system malfunction.
  • Solution: Replacing the malfunctioning sensor(s).
  • Estimated Cost to Fix: $200 - $800+ per sensor.

Exterior

• No Issues Found

Interior

• COMAND System Malfunctions
  • Description/Symptoms: The COMAND infotainment system may freeze, crash, or exhibit intermittent functionality. Navigation, audio, and other features may be affected.
  • Solution: Software updates or replacement of the COMAND unit.
  • Estimated Cost to Fix: $200 - $3,000+, depending on the solution.

Recalls

• Recalls: 2019120018, 2017020009, 2017020010, 2016120018, 2016080007, 2015020004, 2014100009

Summary

The 2014 Mercedes-Benz CLS63 AMG, while offering impressive performance and luxury, can suffer from several issues. The most concerning are related to the engine, transmission, and air suspension, which can be costly to repair. Electrical issues and interior component malfunctions are also potential concerns. The severity of these issues can range from minor inconveniences to major mechanical failures, with repair costs varying accordingly. Prospective buyers should be aware of these potential problems and factor them into their ownership considerations. A pre-purchase inspection by a qualified mechanic is highly recommended.