2014 Mercedes-Benz GL350 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2014 Mercedes-Benz GL350

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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 2014 Mercedes-Benz GL350 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 GL350 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 2014 Mercedes-Benz GL350?

To effectively diagnose the non-functioning cruise control in your 2014 Mercedes-Benz GL350, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder the system's operation. Following this, verify the functionality of the speed sensor, since a malfunction here can disrupt the cruise control's ability to engage. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are operational, as faulty switches can prevent activation. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as these can lead to failures. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz GL350?

When dealing with a malfunctioning cruise control system in a 2014 Mercedes-Benz GL350, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging by failing to signal that the brake pedal is not pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a steady speed, leading to erratic behavior. Another potential problem is a malfunctioning throttle actuator, which can hinder the cruise control's operation altogether. It's also important to check for vacuum leaks in the engine, as these can affect the necessary vacuum pressure for the cruise control to function properly. Lastly, a defective cruise control module may be the root cause of the failure. By systematically diagnosing these areas, DIYers can effectively troubleshoot and potentially restore the cruise control functionality in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz GL350?

When it comes to a non-functioning cruise control in a 2014 Mercedes-Benz GL350, the urgency of addressing the issue cannot be overstated. While it may seem like a minor inconvenience, neglecting this problem can lead to more significant safety risks and potential damage to the vehicle's electronic systems. Cruise control is designed to enhance driving comfort and efficiency, particularly on long journeys, and its failure may indicate underlying issues that could affect other critical functions of the car. For DIY enthusiasts, it’s essential to recognize that while troubleshooting minor issues may be feasible, the complexity of modern vehicle electronics often necessitates professional diagnostics. Therefore, prioritizing the inspection and repair of the cruise control system not only ensures a safer driving experience but also helps maintain the overall performance and longevity of your vehicle. Taking prompt action can prevent further complications and safeguard your investment in the long run.

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2014 Mercedes-Benz GL350 Cruise Control Issues & Repairs