2021 Mercedes-Benz G63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2021 Mercedes-Benz G63 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2021 Mercedes-Benz G63 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 G63 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 are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2021 Mercedes-Benz G63 AMG?

When troubleshooting the non-functioning cruise control in a 2021 Mercedes-Benz G63 AMG, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control settings in the vehicle's menu to ensure they are correctly configured and activated. Next, inspect the cruise control buttons on the steering wheel for any signs of malfunction, as these can often be the source of the problem. If the buttons are functioning, move on to verify the speed sensors, which are critical for the cruise control system's operation; ensure they are providing accurate readings. Utilizing a diagnostic scanner to check for error codes can also be invaluable, as these codes can pinpoint specific issues within the system. Additionally, inspect the fuse associated with the cruise control; a blown fuse can easily disrupt functionality. Don't overlook the wiring connections, as damaged or corroded wires can impede communication between components. Finally, if all simpler checks yield no results, testing the cruise control module itself may be necessary to determine if it requires replacement. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issue in your G63 AMG.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz G63 AMG?

When the cruise control in your 2021 Mercedes-Benz G63 AMG ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty speed sensor, which is essential for the cruise control system to accurately gauge the vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another common issue is related to the brake light switch; if this switch is defective, it can send incorrect signals to the cruise control system, disrupting its operation. Additionally, a malfunctioning throttle actuator can hinder the system's ability to maintain speed, as it directly controls the engine's throttle opening. In some cases, the cruise control module itself may be defective, necessitating repair or replacement. Lastly, electrical problems such as wiring issues or blown fuses can also impede the cruise control's functionality. By identifying these potential issues, you can take the first steps toward troubleshooting and possibly repairing your cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2021 Mercedes-Benz G63 AMG?

Addressing a malfunctioning cruise control system in your 2021 Mercedes-Benz G63 AMG is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. Beyond safety, neglecting this issue can adversely affect your vehicle's performance, potentially leading to more extensive damage to the engine or other vital components. Additionally, if your vehicle is still under warranty, timely repairs may be covered, preventing you from incurring unnecessary costs. Lastly, maintaining your G63 AMG in optimal condition, including the cruise control system, is essential for preserving its resale value. Therefore, it is crucial to prioritize the repair of any cruise control malfunctions to ensure your safety, protect your investment, and maintain the vehicle's performance.

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2021 Mercedes-Benz G63 AMG Cruise Control Issues & Solutions