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

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz C63 AMG S and How to Fix Them

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Reviewed by
Devin Cabugcal
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 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 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz C63 AMG S

When troubleshooting cruise control issues in your Mercedes-Benz C63 AMG S, it's crucial to adopt a methodical diagnostic approach. Start by checking the brake pedal switch, as a faulty switch can prevent the cruise control from engaging. If the switch appears to be functioning correctly, the next step is to inspect the fuse associated with the cruise control system; a blown fuse can easily disrupt the operation. Should these initial checks not resolve the issue, you may need to investigate the throttle control module and its associated sensors, as problems here can also lead to cruise control malfunctions. Engaging with community insights can be beneficial, as some owners have shared their DIY experiences, including attempts to resolder components, although these fixes may not always yield lasting results. By following this structured approach, you can effectively narrow down the potential causes of the cruise control issue and implement the necessary repairs.

What Could Cause Cruise Control Malfunctions in a Mercedes-Benz C63 AMG S?

When troubleshooting cruise control malfunctions in a Mercedes-Benz C63 AMG S, it's essential to consider several common problems that could be affecting the system's performance. A defective brake pedal switch is often a primary culprit, as it can prevent the cruise control from engaging properly. Additionally, a dead battery may disrupt the electrical systems, leading to cruise control issues. The ABS wheel speed sensor is another critical component; if it fails, it can trigger warning lights and interfere with cruise control functionality. It's also important to check for blown fuses, particularly those related to the cruise control system, as they can interrupt power supply. The brake pedal sensor's functionality should be verified, as it plays a vital role in the system's operation. Inspecting the multi-function relay located behind the fuse box is also advisable, as a malfunction here can impede cruise control. Furthermore, a faulty brake light switch can cause similar issues, even if the brake lights appear to be working. Lastly, consider the cruise module itself, as problems here may require sourcing a replacement or performing repairs. By systematically addressing these potential issues, you can effectively diagnose and resolve cruise control malfunctions in your vehicle.

Why is the Cruise Control Not Working in a Mercedes-Benz C63 AMG S?

When the cruise control in your Mercedes-Benz C63 AMG S fails to operate, it’s crucial to address the issue without delay. Ignoring symptoms such as a non-responsive system or warning lights can lead to unsafe driving conditions, especially if you rely on cruise control for long-distance travel. Common culprits include a defective brake pedal switch, which can prevent the system from engaging, or a blown fuse that disrupts its functionality. Additionally, problems with the throttle control system or the ABS may also contribute to the malfunction. If the display shows dashes instead of the set speed, this indicates a deeper issue within the cruise control system that requires immediate attention. While some problems may seem minor, they can escalate into significant safety hazards if left unresolved. Therefore, it is advisable to conduct a thorough inspection of the relevant components, including the brake lights and fuses, and consult a professional service team for a comprehensive diagnosis and repair. Taking these steps not only ensures your vehicle operates safely but also helps prevent potential damage that could arise from prolonged neglect.

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