2006 Mercedes-Benz ML350 Cruise Control Isn't Working

Fix cruise control issues in your 2006 Mercedes-Benz ML350

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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 2006 Mercedes-Benz ML350 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 2006 Mercedes-Benz ML350 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 2006 Mercedes-Benz ML350?

When diagnosing a cruise control issue in a 2006 Mercedes-Benz ML350, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex systems. Begin by inspecting the cruise control fuse, as a blown fuse is a common and easily rectifiable problem that can disrupt the system's functionality. Next, assess the cruise control buttons on the steering wheel to ensure they are working correctly, since malfunctioning buttons can lead to operational issues. Utilizing a diagnostic scanner to retrieve error codes from the vehicle's onboard computer can provide critical insights into any underlying problems affecting the cruise control system. Additionally, checking the speed sensors is vital, as these components are essential for the cruise control to function properly. It's also important to examine the wiring and connections related to the cruise control system for any signs of damage or corrosion, as these can significantly impact performance. Finally, testing the cruise control module will help confirm whether it is operating as intended, as a faulty module can be a primary cause of cruise control failures. By systematically following these steps, you can effectively diagnose and resolve cruise control issues in your ML350, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz ML350?

When dealing with cruise control issues in a 2006 Mercedes-Benz ML350, it's essential to understand the common problems that may be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, speed sensor issues can disrupt the cruise control's functionality, as the system relies on accurate speed readings to maintain performance. Another potential problem is vacuum leaks, which can interfere with the cruise control's ability to sustain a steady speed. A defective cruise control module may also be responsible for the malfunction, as it plays a critical role in the system's operation. Lastly, electrical problems, including blown fuses or wiring issues, can significantly impact the cruise control's performance. By identifying and addressing these common issues, DIYers can effectively troubleshoot and resolve cruise control problems in their vehicle.

How urgent is it to repair the non-functioning cruise control in a 2006 Mercedes-Benz ML350?

Repairing the non-functioning cruise control in a 2006 Mercedes-Benz ML350 should not be overlooked, as neglecting this issue can lead to significant safety risks and further vehicle complications. While it may seem like a minor inconvenience, a malfunctioning cruise control system can indicate deeper problems within the vehicle's electronic or mechanical components. This could potentially affect not only the cruise control but also other critical systems, leading to more extensive and costly repairs down the line. Additionally, without cruise control, drivers may experience increased fatigue during long drives, which can impair focus and reaction times, heightening the risk of accidents. Therefore, addressing this issue promptly is essential for maintaining both the comfort and safety of your driving experience. For those considering a DIY approach, diagnosing the problem early can save time and money, ensuring that your vehicle remains in optimal condition.

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