Mercedes-Benz GLC63 AMG S Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz GLC63 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz GLC63 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 GLC63 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 GLC63 AMG S

When troubleshooting cruise control issues in your Mercedes-Benz GLC63 AMG S, it's essential to adopt a systematic diagnostic approach. Start by checking the simplest components first, such as the control module and sensors, as these are often the most common culprits. Inspect the control module for any signs of malfunction, as a faulty module can disrupt the entire cruise control system. Next, examine the sensors that monitor vehicle speed and other critical data; a malfunctioning sensor can lead to inaccurate readings, causing the cruise control to fail. If these components appear to be functioning correctly, turn your attention to the throttle, as any issues here can prevent the system from maintaining a steady speed. Additionally, assess the mechanical and electronic components for wear or damage, as these can also contribute to cruise control malfunctions. If you encounter a cruise control inoperative warning message, it’s a clear indication that further investigation is needed. While DIY troubleshooting can help identify some issues, consulting a professional service team is advisable for a thorough diagnosis and repair, ensuring your cruise control system operates smoothly and safely.

What Could Cause Cruise Control Malfunctions in a Mercedes-Benz GLC63 AMG S?

When diagnosing cruise control malfunctions in a Mercedes-Benz GLC63 AMG S, it's crucial to consider several common problems that may be affecting the system. One of the primary culprits is a failed control module, which can disrupt the communication between various components. Additionally, sensor or switch issues can prevent the cruise control from engaging or maintaining speed. Throttle actuation problems are another frequent cause, as they can hinder the system's ability to adjust speed as intended. Furthermore, a defective brake pedal switch can inadvertently signal that the brakes are engaged, disabling the cruise control. Lastly, issues with the ABS wheel speed sensor can not only affect cruise control functionality but may also trigger warning lights for the Electronic Stability Program (ESP) and Anti-lock Braking System (ABS). By understanding these potential failure modes, DIY enthusiasts can better diagnose and address cruise control issues in their GLC63 AMG S, ensuring a smoother and safer driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz GLC63 AMG S?

When the cruise control in your Mercedes-Benz GLC63 AMG S is not functioning, it’s crucial to understand the potential causes and the urgency of addressing them. A defective brake pedal switch is often the culprit, as it can prevent the cruise control from engaging. Additionally, a blown fuse may disrupt the system, leading to a complete failure of the cruise control functionality. More complex issues, such as problems with the throttle control system or the ABS, can also contribute to this malfunction. If you notice warning lights for the ESP or ABS, it may indicate a faulty ABS wheel speed sensor, which can disable cruise control for safety reasons. Furthermore, if there are any ESP errors, they can automatically deactivate the cruise control, often linked to issues with various sensors. Lastly, transmission problems, including a malfunctioning speed sensor, can also hinder cruise control performance. Given that these issues can pose safety risks and potentially lead to more significant vehicle damage, it is advisable to address them promptly, either through DIY troubleshooting or by consulting a qualified service professional.

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