2009 Mercedes-Benz G55 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2009 Mercedes-Benz G55 AMG

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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 2009 Mercedes-Benz G55 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 2009 Mercedes-Benz G55 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 are the steps to diagnose the cruise control issue in a 2009 Mercedes-Benz G55 AMG?

When diagnosing a cruise control issue in a 2009 Mercedes-Benz G55 AMG, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex solutions. Begin by examining the cruise control fuse, as a blown fuse can easily disrupt the system's operation. If the fuse is intact, proceed to inspect the cruise control switch on the steering wheel, since a malfunctioning switch is a common source of problems. Should these initial steps not yield results, utilize a diagnostic scanner to check for error codes from the vehicle's onboard computer, which can help pinpoint specific issues. Additionally, assess the functionality of the speed sensors, as they are vital for the cruise control system's performance. It's also essential to inspect the wiring and connections related to the cruise control system for any signs of damage or corrosion, as faulty wiring can lead to significant malfunctions. Lastly, test the cruise control module to ensure it is functioning correctly, as a defective module can hinder the system's ability to engage or disengage properly. By systematically following these steps, you can effectively diagnose and address the cruise control issues in your G55 AMG.

What are the common problems that could cause the cruise control to stop working in a 2009 Mercedes-Benz G55 AMG?

When the cruise control in your 2009 Mercedes-Benz G55 AMG ceases to function, several common issues may be at play. One of the primary culprits is a defective component or sensor that is essential for the cruise control system's operation. A blown fuse can also disrupt the system, so checking the fuse box is a good starting point. Additionally, the brake pedal switch is known to fail, which can prevent the cruise control from engaging. Other potential problems include a malfunctioning wheel speed sensor or magnetic ring, which are critical for maintaining speed, as well as issues with the steering angle sensor or yaw switch. It's also important to ensure that your vehicle's tires are the correct profile, as incorrect wheel or tire combinations can interfere with the cruise control's functionality. If you encounter these issues, a thorough inspection of these components can help you identify the root cause and guide you toward a DIY solution.

How urgent is it to repair the non-functioning cruise control in a 2009 Mercedes-Benz G55 AMG?

When evaluating the urgency of repairing the non-functioning cruise control in a 2009 Mercedes-Benz G55 AMG, it is essential to recognize that while it may not pose an immediate safety threat like brake failure, it still warrants prompt attention. The absence of cruise control can lead to increased driver fatigue, particularly on long journeys, as maintaining a consistent speed becomes more labor-intensive. This can distract the driver and potentially compromise safety on the road. Additionally, the comfort factor cannot be overlooked; cruise control allows for a more relaxed driving experience, reducing strain on the driver's foot during extended trips. Furthermore, addressing this issue can significantly impact the vehicle's resale value. Prospective buyers often shy away from vehicles with unresolved mechanical problems, which can diminish marketability. Therefore, while the urgency may not be critical, timely repair of the cruise control system is advisable to enhance safety, improve comfort, and preserve the vehicle's value.

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2009 Mercedes-Benz G55 AMG Cruise Control Issues & Repairs