2018 Mercedes-Benz AMG GT Cruise Control Isn't Working

Fixing Cruise Control Issues in 2018 Mercedes-Benz AMG GT

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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 2018 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 2018 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 2018 Mercedes-Benz AMG GT?

When faced with a non-functional cruise control in a 2018 Mercedes-Benz AMG GT, it's crucial to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can be a simple yet common culprit behind the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as any issues here can directly affect functionality. It's also important to verify the speed sensors, as faulty sensors can prevent the cruise control from engaging properly. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues within the cruise control system. Additionally, examine the brake and clutch switches, as malfunctioning switches can inhibit activation. Finally, a thorough inspection of the wiring and connections related to the cruise control system is essential, as damaged or loose connections can disrupt its operation. By following these steps, you can effectively troubleshoot the cruise control issue and potentially restore its functionality without needing professional assistance.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz AMG GT?

When troubleshooting the cruise control system in a 2018 Mercedes-Benz AMG GT, it's essential to understand the common problems that may lead to its failure. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can pose significant challenges; since the cruise control is designed to disengage when the brake pedal is pressed, a malfunctioning switch may fail to send the correct signal to the cruise control module. Another critical component to consider is the throttle actuator, as any malfunction here can hinder the system's capacity to maintain speed effectively. Furthermore, a defective cruise control module can create communication breakdowns between various system components, leading to operational failures. Lastly, electrical issues such as wiring problems or blown fuses can also contribute to the cruise control system's malfunction. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control functionality in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2018 Mercedes-Benz AMG GT?

Addressing a malfunctioning cruise control in a 2018 Mercedes-Benz AMG GT is of utmost importance due to the significant safety risks it poses. A faulty system can lead to unexpected acceleration or deceleration, which can be dangerous for both the driver and other road users. Additionally, a malfunctioning cruise control detracts from the overall driving experience, making long journeys less convenient and enjoyable. Ignoring these symptoms can lead to more severe issues within the vehicle's systems, resulting in costly repairs down the line. Therefore, it is crucial to prioritize the repair of cruise control problems to ensure not only your safety but also the longevity and performance of your vehicle.

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