2019 Mercedes-Benz AMG GT C Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Mercedes-Benz AMG GT C and How to Fix Them

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Reviewed by
Aisha
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 2019 Mercedes-Benz AMG GT C 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 2019 Mercedes-Benz AMG GT C 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 steps to diagnose the cruise control issue in a 2019 Mercedes-Benz AMG GT C?

To effectively diagnose a cruise control issue in your 2019 Mercedes-Benz AMG GT C, begin with the simplest solutions. Start by checking the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to engagement problems. If these initial checks do not resolve the issue, utilize a diagnostic scanner to identify any error codes from the vehicle's onboard computer, which can provide insights into specific malfunctions. Following this, examine the speed sensors, as they are critical for the cruise control system's performance; any faults here can significantly impact operation. Additionally, test the brake pedal switch, since a malfunction can prevent the cruise control from engaging altogether. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for signs of damage or corrosion that could hinder functionality. By following this structured approach, you can systematically identify and address the root cause of the cruise control issue, ensuring a more efficient and effective DIY repair process.

What are the common problems that could cause the cruise control to stop working in a 2019 Mercedes-Benz AMG GT C?

When the cruise control in your 2019 Mercedes-Benz AMG GT C 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 your vehicle's speed. If this sensor malfunctions, the system may not engage properly. Additionally, the brake light switch can also be a source of trouble; if it is defective, it may incorrectly signal that the brake pedal is pressed, thereby disabling the cruise control. Another potential issue lies with the throttle actuator, which is responsible for regulating engine communication with the cruise control system. If this component fails, it can disrupt the entire system's operation. Electrical problems, such as blown fuses or damaged wiring, can further complicate matters, as they may prevent the cruise control from receiving the necessary power. Lastly, software glitches within the vehicle's onboard computer can lead to unexpected behavior in the cruise control system. By systematically checking these areas, you can effectively troubleshoot and potentially resolve the issues affecting your cruise control.

How urgent is it to address the malfunctioning cruise control in a 2019 Mercedes-Benz AMG GT C?

Addressing a malfunctioning cruise control in your 2019 Mercedes-Benz AMG GT C 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. Moreover, the enjoyment and ease of driving that cruise control offers can be severely compromised, detracting from the overall driving experience. Ignoring these symptoms can also result in more extensive damage to the vehicle's systems, leading to costly repairs down the line. Therefore, it is essential to prioritize the resolution of cruise control issues to ensure both your safety and the longevity of your vehicle.

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