Mercedes-Benz GLC63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz GLC63 AMG and How to Fix Them

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Reviewed by
Bo Fader
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 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 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

When troubleshooting cruise control issues in your Mercedes-Benz GLC63 AMG, start by checking the simplest components first. Begin with the brake light switch, as a malfunction here can disable the cruise control even if the brake lights appear to be functioning normally. Next, inspect the cruise control connector for any signs of dry solder joints, which can lead to intermittent failures; re-soldering these joints may resolve the issue. If warning lights such as the ETS and ABS are illuminated, this could indicate deeper electrical problems that may require scanning for fault codes. Additionally, consider the condition of the Control Module and throttle components, as these are critical for cruise control operation. If your model features advanced automatic cruise control, ensure that the system is calibrated correctly and that there are no obstructions affecting its sensors. By following this diagnostic approach, you can systematically identify and address the root cause of your cruise control issues, ensuring a smoother and safer driving experience.

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

When dealing with cruise control issues in your Mercedes-Benz GLC63 AMG, it's crucial to recognize the common problems that may be affecting the system. A failed control module, sensor, or switch can often be the culprit, leading to a complete failure of the cruise control functionality. Additionally, throttle actuation problems, particularly those stemming from a faulty throttle position sensor, can cause the engine's computer to mismanage fuel delivery, which may result in noticeable black exhaust emissions. Other issues to consider include a defective brake pedal switch, which can inadvertently disengage the cruise control, or even a dead battery that affects the vehicle's electrical systems. Furthermore, a malfunctioning ABS wheel speed sensor can disrupt the cruise control's operation, as it relies on accurate speed readings to maintain the set speed. By understanding these potential issues, DIY enthusiasts can better diagnose and address cruise control problems, ensuring a smoother driving experience.

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

When the cruise control in your Mercedes-Benz GLC63 AMG is not functioning, it is crucial to address the issue promptly, as neglecting it can lead to safety risks and further vehicle damage. Common culprits include a defective brake pedal switch, which can prevent the system from engaging, or a dead battery that may disrupt electrical components. Additionally, a faulty ABS wheel speed sensor can interfere with the cruise control's operation, while problems with the throttle control system or ABS may also contribute to the malfunction. In older models, a broken vacuum line could be the source of the issue. Given the potential implications for your driving experience and safety, it is advisable to seek a professional inspection to accurately diagnose and resolve the problem, ensuring your vehicle remains in optimal condition.

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