Mercedes-Benz C63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz C63 AMG 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz C63 AMG 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 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

When troubleshooting cruise control issues in your Mercedes-Benz C63 AMG, it's essential to adopt a methodical diagnostic approach. Start by checking the control module, as a malfunction here can trigger warning messages on your instrument cluster. If the cruise control becomes inoperative, this is a clear sign that the module may need attention. Next, inspect the brake light switch; a faulty switch can disrupt cruise control functionality, especially if the system disengages when you apply the brakes. If these initial checks do not resolve the issue, consider examining the cruise module itself. For those with soldering skills, there are guides available that can assist in repairing this component. Additionally, don't overlook the importance of front bearings and sensors, as replacing these parts has proven effective for some owners. Throughout this process, gather data and document your findings, as this can help you pinpoint the root cause of the problem. By following this structured approach, you can efficiently diagnose and potentially resolve cruise control issues in your vehicle.

What Are the Common Issues Causing Cruise Control Failure in a Mercedes-Benz C63 AMG?

When diagnosing cruise control failure in a Mercedes-Benz C63 AMG, it's crucial to understand the common problems that may arise. One frequent issue is the failure of the control module, which can disrupt the entire cruise control system. Additionally, sensor or switch malfunctions can prevent the cruise control from engaging properly. Throttle actuation problems are another potential culprit, as they can interfere with the system's ability to maintain speed. For those experiencing intermittent cruise control functionality, it may be indicative of underlying electronic or mechanical issues, particularly in non-vacuum systems. Furthermore, owners have reported various engine-related problems, such as unusual noises at startup and rising oil levels, which could indirectly affect the cruise control system. By being aware of these common issues, DIY enthusiasts can better troubleshoot and address cruise control failures in their C63 AMG, ensuring a smoother driving experience.

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

When the cruise control in your Mercedes-Benz C63 AMG is not functioning, it’s essential to address the issue promptly, as neglecting it could lead to safety risks while driving. A defective brake pedal switch is often the culprit, as it directly affects the engagement of the cruise control system. Additionally, a blown fuse or a malfunctioning ABS wheel speed sensor can disrupt the system, making it crucial to check these components. Problems with the throttle control system or ABS can also hinder cruise control functionality, so a thorough inspection is necessary. Furthermore, an ESP error can disable the cruise control even if the system itself is intact, often stemming from issues with the brake light switch or wheel speed sensor. By diagnosing these potential problems early, you can avoid more significant repairs down the line and ensure a safer driving experience.

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