2014 Mercedes-Benz G550 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2014 Mercedes-Benz G550

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Reviewed by
Devin Cabugcal
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 2014 Mercedes-Benz G550 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 2014 Mercedes-Benz G550 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 non-functioning cruise control in a 2014 Mercedes-Benz G550?

When diagnosing the non-functioning cruise control in a 2014 Mercedes-Benz G550, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive, as malfunctioning buttons can disrupt functionality. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying electronic issues. Additionally, verify the speed sensors, as they play a crucial role in the cruise control system's ability to engage. It's also important to examine the brake and clutch switches, which are designed to disengage the cruise control when either pedal is pressed. If these initial checks do not resolve the issue, testing the cruise control module may be necessary, as a faulty module can lead to complete system failure. Should these steps not yield results, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable for further diagnosis and repair. By following this structured approach, you can effectively identify and address the problem with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz G550?

When dealing with cruise control issues in a 2014 Mercedes-Benz G550, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging by failing to signal when the brake pedal is pressed. Additionally, a malfunctioning speed sensor can disrupt the system's ability to maintain a steady speed, leading to operational failures. It's also wise to check for a blown fuse, as this can completely disable the cruise control system; replacing any blown fuses could restore functionality. Problems with the throttle actuator, which regulates speed, may also hinder the cruise control's performance. Lastly, a defective cruise control module can be a significant factor in these issues, and replacing it might be necessary to get the system back up and running. By systematically addressing these potential problems, you can effectively troubleshoot and resolve cruise control failures in your vehicle.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz G550?

Addressing the non-functioning cruise control in a 2014 Mercedes-Benz G550 is crucial for both safety and vehicle performance. When cruise control fails, it may not only diminish the convenience of long-distance driving but also signal deeper electronic or sensor issues that could compromise the vehicle's overall functionality. Ignoring this problem can lead to more severe complications, potentially escalating repair costs and affecting other systems within the car. Moreover, a malfunctioning cruise control can increase driver fatigue during extended trips, as the driver must constantly monitor speed without the assistance of this feature. Therefore, it is essential to prioritize the repair of the cruise control system to maintain a safe and efficient driving experience, ensuring that your vehicle remains reliable on the road.

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2014 Mercedes-Benz G550 Cruise Control Issues & Solutions