2018 Mercedes-Benz C63 AMG S Cruise Control Isn't Working

Fixing Cruise Control Issues in 2018 Mercedes-Benz C63 AMG S

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
0%
25% chance it's the
Control Module
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2018 Mercedes-Benz C63 AMG S cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty or malfunctioning sensor can lead to incorrect readings, causing issues with engine performance or other systems relying on accurate data.
  • Control Module: A faulty control module can lead to erratic vehicle behavior or failure of various electronic systems due to improper signal processing.
  • Throttle: A faulty throttle body or a defective accelerator pedal position sensor may be causing inconsistent throttle response.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2018 Mercedes-Benz C63 AMG S cruise control isn't working?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

In the event that a wheel speed sensor fails, the ABS, traction control system (TCS) and manufacturer specific stability control system lights will illuminate, informing the driver that the systems are disabled. The vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct for the loss of computer control. On older vehicle's, the speedometer can be affected, causing illumination of the check engine light as well.

What steps should I take to diagnose the cruise control issue in my 2018 Mercedes-Benz C63 AMG S?

To effectively diagnose the cruise control issue in your 2018 Mercedes-Benz C63 AMG S, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to malfunctions. Utilizing a diagnostic scanner to check for error codes is also crucial, as it can reveal specific issues within the cruise control system. Following this, verify the speed sensors, which are essential for maintaining speed; any faults here can significantly impact performance. Additionally, inspect the wiring connections for any damage or looseness, as compromised wiring can hinder communication between components. Finally, test the cruise control module itself to confirm it is functioning correctly, as a malfunctioning module can prevent the system from operating as intended. By adhering to this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control problem in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz C63 AMG S?

When troubleshooting the cruise control system in a 2018 Mercedes-Benz C63 AMG S, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing the cruise control from engaging or maintaining the desired speed. Additionally, the brake light switch plays a critical role; if it malfunctions, the cruise control may disengage unexpectedly, as it is designed to do when the brake pedal is pressed. Another potential culprit is the throttle actuator, which regulates the engine's throttle opening; any issues here can hinder the cruise control's performance. Furthermore, a defective cruise control module can impede communication between various system components, leading to operational failures. Lastly, electrical problems such as wiring issues or blown fuses can also contribute to the cruise control system's inability to function correctly. By identifying and addressing these common issues, you can effectively diagnose and restore the cruise control functionality in your vehicle.

How urgent is the repair for the non-functioning cruise control in a 2018 Mercedes-Benz C63 AMG S?

When assessing the urgency of repairing the non-functioning cruise control in your 2018 Mercedes-Benz C63 AMG S, it's essential to weigh several factors. While the absence of cruise control does not directly compromise safety, it can diminish your driving experience, particularly on long journeys where maintaining a constant speed is beneficial. If you frequently rely on this feature for comfort, the urgency to address the issue increases. Additionally, neglecting the repair could potentially affect the vehicle's resale value, as prospective buyers often look for fully functional features. To ensure you understand the underlying cause of the malfunction and its implications, it is wise to consult a qualified mechanic for a diagnostic check. This proactive approach not only enhances your driving comfort but also preserves the overall functionality and value of your vehicle.

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