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2017 Mercedes-Benz C63 AMG S

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By Research the Car 4 min read

The 2017 Mercedes-Benz C63 AMG S is a performance-oriented version of the C-Class sedan, coupe, and convertible. It is lauded for its powerful engine, sharp handling, and luxurious interior. However, some owners have reported encountering certain issues. The C63 AMG S distinguishes itself from the base C-Class with its handcrafted 4.0L twin-turbo V8 engine, producing 503 horsepower and 516 lb-ft of torque. It is exclusively paired with a 7-speed AMG SPEEDSHIFT MCT transmission. Some common owner complaints revolve around the firm ride quality, higher running costs, and potential for electronic glitches.

Engine

4.0L Twin-Turbo V8 (M177)

  • Turbocharger Failure
    • Description/Symptoms: Whining noise from the turbocharger, loss of power, check engine light. Potential cause is oil starvation or bearing failure.
    • Solution: Turbocharger replacement. It is recommended to replace both turbos at the same time.
    • Estimated Cost to Fix: $4,000 - $6,000+ (parts and labor for both turbos)
  • Valve Cover Gasket Leaks
    • Description/Symptoms: Oil leaks from the valve cover area, burning oil smell, visible oil residue on the engine.
    • Solution: Replacement of the valve cover gaskets.
    • Estimated Cost to Fix: $500 - $1,000+
  • Oil Separator/PCV Valve Failure
    • Description/Symptoms: Rough idle, oil consumption, check engine light, possible whistling sound.
    • Solution: Replacement of the oil separator/PCV valve.
    • Estimated Cost to Fix: $300 - $600

Transmission

7-Speed AMG SPEEDSHIFT MCT

  • Harsh Shifting/Jerking
    • Description/Symptoms: Rough or jerky gear changes, especially during downshifts or at low speeds. Can sometimes be resolved with a software update, but could indicate internal wear.
    • Solution: Software update to transmission control module (TCM). If the update does not resolve the issue, transmission service/repair may be required.
    • Estimated Cost to Fix: $200 - $400 for software update; $500 - $1,000+ for transmission service; $4,000+ for major repairs or replacement
  • Delayed Engagement
    • Description/Symptoms: A noticeable delay between shifting into drive or reverse and the transmission actually engaging.
    • Solution: Transmission service, potentially valve body repair or replacement.
    • Estimated Cost to Fix: $1,000 - $3,000+

Suspension

  • Air Suspension Malfunctions (if equipped)
    • Description/Symptoms: The vehicle sits unevenly, the suspension warning light is illuminated, the ride quality is poor, and/or the compressor is running excessively.
    • Solution: Diagnose the source of the leak (air strut, air line, valve block) and replace the faulty component.
    • Estimated Cost to Fix: $1,500 - $3,000+ per strut, depending on location and if aftermarket parts are used.
  • Creaking/Squeaking Noises
    • Description/Symptoms: Suspension components (especially control arm bushings) can develop creaking or squeaking noises, particularly in colder weather or over bumps.
    • Solution: Replacement of worn bushings or control arms.
    • Estimated Cost to Fix: $500 - $1,500+ depending on the component and labor.

Electrical

  • Infotainment System Issues
    • Description/Symptoms: Freezing, crashing, slow response times, Bluetooth connectivity problems, and navigation malfunctions.
    • Solution: Software update, system reset, or replacement of the head unit (if problem cannot be fixed with software update)
    • Estimated Cost to Fix: $0 (software update) to $1,500+ (head unit replacement).
  • Sensor Failures
    • Description/Symptoms: Malfunctions of various sensors like parking sensors, blind spot monitoring, or lane keeping assist.
    • Solution: Diagnosis and replacement of the faulty sensor.
    • Estimated Cost to Fix: $200 - $800+ per sensor, depending on location and complexity.
  • Battery Drain
    • Description/Symptoms: The battery dies frequently, especially if the car sits for a few days, even with a healthy battery.
    • Solution: Identify and eliminate the source of the parasitic drain. Common culprits include faulty modules or aftermarket accessories.
    • Estimated Cost to Fix: $100 - $500+ depending on the complexity of the problem.

Exterior

  • No Issues Found

Interior

  • Seat Belt Presenter Malfunction (Coupe/Convertible)
    • Description/Symptoms: The seat belt presenter arm fails to extend or retract properly.
    • Solution: Replacement of the seat belt presenter mechanism.
    • Estimated Cost to Fix: $500 - $1000+

Recalls:

  • NHTSA Recall Number: 19V274000
    • Component: Electrical System, Vehicle Speed Control
    • Summary: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 C300, C300 coupe, C300 cabriolet, C43 AMG coupe, C43 AMG, C63 AMG coupe, C63 AMG S, E300, E300 4Matic, E400 coupe, E43 AMG, S550e, GLC300, GLC300 4Matic, C63 AMG S cabriolet, and E400 cabriolet vehicles. A software error may cause the vehicles to accelerate after the driver releases the accelerator pedal.
  • NHTSA Recall Number: 20V104000
    • Component: Electrical System, Vehicle Speed Control
    • Summary: Mercedes-Benz USA, LLC (MBUSA) is recalling certain 2017 C300, C300 coupe, C300 cabriolet, C43 AMG coupe, C43 AMG, C63 AMG coupe, C63 AMG S, E300, E300 4Matic, E400 coupe, E43 AMG, S550e, GLC300, GLC300 4Matic, C63 AMG S cabriolet, and E400 cabriolet vehicles. A software error may cause the vehicles to accelerate after the driver releases the accelerator pedal.

Summary:

The 2017 Mercedes-Benz C63 AMG S, while offering exhilarating performance, can be prone to several issues. Engine-related problems, especially turbocharger and valve cover gasket failures, can be costly to address. Transmission issues and electrical glitches can also contribute to the overall ownership expenses. Suspension problems, specifically with air suspension, can be expensive to repair, although this only applies to cars equipped with it. Overall, potential buyers should be aware of these common problems and factor in potential repair costs when considering this vehicle. The severity and cost of these issues range from minor inconveniences that can be fixed relatively cheaply to major repairs that can cost several thousand dollars. Checking vehicle history reports and performing a pre-purchase inspection are highly recommended.

Mercedes-Benz, C63 AMG S
Mercedes-Benz C63 AMG S 2017
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