2021 Mercedes-Benz GLC63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2021 Mercedes-Benz GLC63 AMG

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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 2021 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 2021 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.

What steps should I take to diagnose the cruise control issue in my 2021 Mercedes-Benz GLC63 AMG?

To effectively diagnose the cruise control issue in your 2021 Mercedes-Benz GLC63 AMG, 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 often be the root cause of the malfunction. Next, examine the cruise control buttons on your steering wheel for any signs of damage or wear that could hinder their operation. Utilizing an OBD-II scanner is crucial at this stage; it allows you to retrieve any error codes that may indicate specific problems within the cruise control system. Following this, check the speed sensors, as they are integral to the system's functionality. Ensure that all wiring connections related to the cruise control are secure and undamaged, as loose or frayed wires can disrupt signals. If these preliminary checks do not resolve the issue, proceed to test the cruise control module itself to confirm it is functioning correctly. Should you find that the problem persists despite these efforts, it may be time to consult a professional mechanic or an authorized Mercedes-Benz service center for a more thorough diagnosis. This structured approach not only helps in identifying the issue efficiently but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz GLC63 AMG?

When the cruise control in your 2021 Mercedes-Benz GLC63 AMG ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the system to accurately gauge your vehicle's speed. If this sensor malfunctions, the cruise control may fail to engage or maintain the desired speed. Another frequent issue arises from the brake light switch; if this switch is defective, it may not signal the cruise control system correctly, causing it to disengage unexpectedly. Additionally, problems with the throttle actuator can hinder the system's ability to maintain speed, as this component regulates the engine's throttle opening. A defective cruise control module can also disrupt communication between various system components, leading to operational failures. Lastly, electrical issues such as wiring faults or blown fuses can prevent the cruise control from functioning properly. By identifying and addressing these common issues, you can restore the functionality of your cruise control system and enhance your driving experience.

How urgent is it to address the malfunctioning cruise control in a 2021 Mercedes-Benz GLC63 AMG?

Addressing a malfunctioning cruise control in a 2021 Mercedes-Benz GLC63 AMG is of utmost urgency due to the significant safety risks it poses. A faulty cruise control system can hinder the driver’s ability to maintain a steady speed, increasing the likelihood of accidents on the road. Moreover, such malfunctions may signal deeper issues within the vehicle's electronic systems or sensors, which could compromise other critical functions. Ignoring these symptoms not only jeopardizes safety but can also lead to decreased fuel efficiency and a less enjoyable driving experience, as the cruise control system is designed to enhance comfort during long journeys. Timely intervention is crucial; by diagnosing and repairing the issue promptly, you can prevent further damage to the vehicle and potentially save on costly repairs down the line. Therefore, it is highly advisable to seek professional assistance as soon as you notice any problems with the cruise control system.

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