2007 Mercedes-Benz GL450 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2007 Mercedes-Benz GL450 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2007 Mercedes-Benz GL450 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 2007 Mercedes-Benz GL450 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 are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2007 Mercedes-Benz GL450?

When troubleshooting the non-functioning cruise control in a 2007 Mercedes-Benz GL450, it's essential to adopt a systematic diagnostic approach that begins with the simplest solutions before progressing to more complex issues. Start by checking the cruise control fuse in the fuse box, as a blown fuse can easily disrupt functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent activation. It's also crucial to examine the speed sensors, which are vital for the cruise control system's operation; any dirt or damage here can lead to malfunctions. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying electronic issues. Additionally, verify that the brake and clutch switches are functioning correctly, as these safety features can disable cruise control when engaged. Don't overlook the importance of inspecting wiring and connections for any signs of damage or corrosion, as these can significantly impact system performance. Finally, testing the cruise control module itself will help determine if it is receiving power and sending signals properly. By following this structured approach, you can effectively identify and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2007 Mercedes-Benz GL450?

When the cruise control in a 2007 Mercedes-Benz GL450 ceases to function, several common problems may be at play. One of the primary culprits could be a defective component or sensor that is essential for the cruise control system's operation. Additionally, issues with the brake light switch can disrupt the system, as it is designed to deactivate cruise control when the brakes are applied. Malfunctioning wheel speed sensors may also contribute to the problem, as they provide critical data for maintaining speed. Lastly, problems with the fuse or brake lights can prevent the cruise control from engaging properly. For DIY enthusiasts, diagnosing these issues involves checking the functionality of these components, ensuring that all connections are secure, and replacing any faulty parts to restore the cruise control system's performance. By understanding these common failure modes, you can effectively troubleshoot and potentially resolve the cruise control issues in your vehicle.

How urgent is it to repair the non-functioning cruise control in a 2007 Mercedes-Benz GL450?

When evaluating the urgency of repairing the non-functioning cruise control in your 2007 Mercedes-Benz GL450, it's essential to recognize the implications of neglecting this issue. While it may not pose an immediate safety hazard like brake or steering failures, the absence of cruise control can lead to increased driver fatigue and distraction, particularly during long drives. This can compromise overall road safety, making timely repairs a prudent choice. Additionally, the comfort of your driving experience is significantly enhanced by cruise control, allowing for a more relaxed journey without the constant need to adjust your speed. Furthermore, addressing this issue promptly can help maintain the vehicle's resale value; potential buyers may view a malfunctioning cruise control system as a sign of neglect, which could deter them from purchasing your vehicle or lead to lower offers. Therefore, while the urgency may not be as high as other critical repairs, taking action to fix the cruise control system is advisable for a safer, more enjoyable driving experience and to protect your investment in the long run.

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