Mercedes-Benz AMG GT 43 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz AMG GT 43 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 AMG GT 43 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 AMG GT 43 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

Troubleshooting Cruise Control Issues in a Mercedes-Benz AMG GT 43

When troubleshooting cruise control issues in your Mercedes-Benz AMG GT 43, begin with the simplest potential problems. Start by checking the brake light switch, as a malfunctioning switch can deactivate the cruise control system, mistakenly signaling that the brakes are engaged. Next, inspect the control module and throttle sensor for any visible signs of damage or disconnection. If the cruise control is intermittently functioning, look for loose connections or faulty components that may be causing the system to drop out. Additionally, keep an eye out for any warning messages on the instrument cluster, as these can indicate electronic or mechanical faults that need addressing. If you suspect a more complex issue, such as a dry solder joint in the cruise control connector, consider re-soldering it to restore functionality. By systematically checking these components, you can effectively diagnose and potentially resolve cruise control problems without needing to visit a professional service center.

What Could Cause Cruise Control Issues in a Mercedes-Benz AMG GT 43?

When troubleshooting cruise control issues in a Mercedes-Benz AMG GT 43, it's essential to consider several common problems that could be affecting the system's performance. A primary suspect is the control module, which can fail and disrupt the communication necessary for cruise control to function properly. Additionally, sensor or switch malfunctions are frequent culprits; these components play a critical role in relaying information about vehicle speed and throttle position. Throttle actuation problems can also hinder the system, as they prevent the engine from responding correctly to cruise control commands. Another important aspect to examine is the brake pedal switch; if this switch is defective, it may incorrectly signal that the brakes are engaged, thereby disabling the cruise control. Furthermore, issues within the throttle control system or the anti-lock braking system (ABS) can also contribute to these malfunctions. By systematically checking these components, DIY enthusiasts can effectively diagnose and potentially resolve cruise control issues in their Mercedes-Benz AMG GT 43.

Why is the Cruise Control Not Working in a Mercedes-Benz AMG GT 43?

When the cruise control in your Mercedes-Benz AMG GT 43 is not functioning, it’s crucial to address the issue promptly, as neglecting it could 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 disrupts electrical components. Additionally, a faulty ABS wheel speed sensor may trigger warning lights and affect cruise control functionality. Other potential issues include a blown fuse, problems with the throttle control system, or even a broken vacuum line in older models. Symptoms like a malfunctioning brake light or the check engine light can also indicate underlying problems that require immediate attention. To ensure your safety and the proper functioning of your vehicle, it is advisable to conduct a thorough inspection or consult a qualified technician to diagnose and resolve the specific cause of the cruise control malfunction.

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