2019 Mercedes-Benz GLS63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2019 Mercedes-Benz GLS63 AMG

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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 2019 Mercedes-Benz GLS63 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 2019 Mercedes-Benz GLS63 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.

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.

What steps should I take to diagnose the non-functioning cruise control in my 2019 Mercedes-Benz GLS63 AMG?

To effectively diagnose the non-functioning cruise control in your 2019 Mercedes-Benz GLS63 AMG, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on your steering wheel to ensure they are operational, as faulty buttons can hinder engagement. Following this, verify the functionality of the speed sensors, since any malfunction here can disrupt the cruise control system. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, assess the brake and clutch switches, as these components must function correctly to enable cruise control. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or loose connections. By methodically following these steps, you can identify the root cause of the cruise control malfunction and take appropriate action to restore its functionality.

What are the common problems that could cause the cruise control to stop working in a 2019 Mercedes-Benz GLS63 AMG?

When the cruise control in your 2019 Mercedes-Benz GLS63 AMG ceases to function, it can be frustrating, but understanding the common issues can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial 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. Additionally, the brake light switch plays a vital role; if it is defective, it may not signal the cruise control system to disengage when the brake pedal is pressed, leading to operational issues. Another potential problem lies with the throttle actuator, which regulates the engine's throttle opening. If this component is malfunctioning, it can disrupt the system's ability to maintain a steady speed. Furthermore, a defective cruise control module can hinder communication between the cruise control system and other vehicle systems, resulting in a loss of functionality. Lastly, electrical problems such as wiring issues or blown fuses can also impede the cruise control system's performance. By systematically checking these components, you can identify the root cause of the issue and take the necessary steps to restore your cruise control functionality.

How urgent is it to address the malfunctioning cruise control in a 2019 Mercedes-Benz GLS63 AMG?

When it comes to a malfunctioning cruise control system in your 2019 Mercedes-Benz GLS63 AMG, the urgency of addressing the issue cannot be overstated. A faulty cruise control can compromise your ability to maintain a steady speed, which is crucial for safe highway driving. This inconsistency not only increases the risk of accidents but can also signal deeper electronic issues within your vehicle that may affect other critical systems. Moreover, neglecting these symptoms can lead to decreased fuel efficiency and accelerated wear on your vehicle, ultimately resulting in more costly repairs down the line. By promptly diagnosing and addressing the malfunction, you not only enhance your driving safety but also protect your investment in the long run. If you're considering a DIY approach, be aware that while some troubleshooting may be feasible, consulting a qualified mechanic for a thorough diagnosis is advisable to ensure all underlying issues are properly addressed.

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