2006 Mercedes-Benz S350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Mercedes-Benz S350 and How to Fix Them

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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 S350 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2006 Mercedes-Benz S350?

When troubleshooting the non-functional cruise control in a 2006 Mercedes-Benz S350, it's crucial to follow a structured diagnostic approach that begins with the simplest checks. Start by inspecting the cruise control fuse in the fuse box; a blown fuse can easily disrupt the system's functionality. Next, examine the cruise control switch on the steering wheel for any signs of damage or malfunction, as this component is essential for activating the system. Additionally, check the brake pedal switch, since a faulty switch can prevent the cruise control from engaging when the brake is applied. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues affecting the cruise control system. Finally, ensure that the vehicle speed sensor is operational, as it plays a critical role in the cruise control's performance. By systematically addressing these areas, you can effectively identify and resolve the issues causing the cruise control malfunction.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz S350?

When dealing with cruise control issues in a 2006 Mercedes-Benz S350, 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 since the system is designed to disengage when the brake pedal is pressed. Additionally, speed sensor issues can arise, as the cruise control system relies on accurate speed readings to maintain the desired speed. Another potential problem is vacuum leaks within the cruise control system, which can disrupt its operation. A defective cruise control module may also be responsible for the malfunction, necessitating a replacement if found to be faulty. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the cruise control's functionality. By systematically checking these components, DIYers can effectively troubleshoot and resolve cruise control problems, restoring functionality to their vehicle.

How urgent is it to repair the non-functioning cruise control in a 2006 Mercedes-Benz S350?

When evaluating the urgency of repairing the non-functioning cruise control in your 2006 Mercedes-Benz S350, it's essential to recognize that while it may not be as critical as other safety features, it still warrants timely attention. The absence of cruise control can lead to increased driver fatigue, especially during long drives, which can compromise safety on the road. Additionally, the comfort and convenience that cruise control provides can significantly enhance your driving experience, making long trips less taxing. Furthermore, neglecting this repair could impact the vehicle's resale value, as potential buyers may view a malfunctioning cruise control system as a significant drawback. Therefore, while it may not be an immediate emergency, addressing the issue promptly can improve your driving safety, comfort, and the overall value of your vehicle.

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2006 Mercedes-Benz S350 Cruise Control Issues & Solutions