2020 Mercedes-Benz AMG GT Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 Mercedes-Benz AMG GT and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2020 Mercedes-Benz AMG GT 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 2020 Mercedes-Benz AMG GT 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-functional cruise control in a 2020 Mercedes-Benz AMG GT?

When faced with a non-functional cruise control in a 2020 Mercedes-Benz AMG GT, start your troubleshooting by checking the cruise control fuse to ensure it is intact, as a blown fuse can often be the simplest fix. Next, verify that the cruise control settings are correctly configured on the dashboard or steering wheel controls, as incorrect settings can prevent the system from engaging. Utilizing a diagnostic scanner to check for any error codes stored in the vehicle's onboard computer is also crucial, as these codes can provide insights into specific malfunctions. Additionally, inspect the cruise control buttons on the steering wheel for any signs of physical damage or malfunction, which could hinder their operation. After these checks, conduct a test drive to see if the cruise control system responds to your commands, and finally, ensure that the vehicle speed sensor is functioning properly, as it plays a vital role in the cruise control system's operation. By following these steps, you can effectively diagnose and potentially resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz AMG GT?

When troubleshooting the cruise control system in a 2020 Mercedes-Benz AMG GT, it's crucial to identify the common problems that may lead to its malfunction. A faulty speed sensor is often a primary issue, as it can disrupt the system's ability to accurately gauge the vehicle's speed, preventing engagement or maintenance of the desired speed. Additionally, problems with the brake light switch can significantly affect functionality; since the cruise control is designed to disengage when the brake pedal is pressed, a malfunctioning switch may cause the system to fail entirely. Another potential culprit is a malfunctioning throttle actuator, which controls the engine's throttle opening and can hinder the cruise control's performance. Furthermore, a defective cruise control module can interrupt communication between various system components, leading to operational failures. Lastly, electrical problems, such as blown fuses, wiring issues, or a weak battery, can also impact the cruise control system's functionality. By understanding these common issues, DIY enthusiasts can better diagnose and address the problems affecting their cruise control system, potentially restoring it to full operation.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz AMG GT?

When it comes to a malfunctioning cruise control system in your 2020 Mercedes-Benz AMG GT, the urgency of addressing the issue cannot be overstated. Ignoring symptoms such as erratic speed control or failure to engage can lead to serious safety risks, including the potential for accidents due to loss of control. Additionally, a malfunctioning cruise control can detract from the overall driving experience, making long trips less enjoyable and more stressful. Beyond immediate safety concerns, neglecting this issue may result in further damage to the vehicle's electronic systems, leading to more extensive and costly repairs down the line. For those considering a DIY approach, it is crucial to recognize that while some troubleshooting may be possible, consulting a qualified mechanic or authorized service center is often the best course of action to ensure the problem is diagnosed and resolved correctly. Prioritizing the repair of your cruise control system not only enhances your driving safety but also preserves the performance and integrity of your luxury vehicle.

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