2006 Mercedes-Benz R350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Mercedes-Benz R350 and How to Fix Them

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Reviewed by
Devin Cabugcal
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 R350 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 R350 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.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2006 Mercedes-Benz R350?

When faced with a non-functional cruise control in your 2006 Mercedes-Benz R350, it's crucial to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, inspect the cruise control switch on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. It's also important to examine the brake pedal switch, as this component is designed to disable cruise control for safety reasons if it is not functioning correctly. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues affecting the cruise control system. Additionally, assess the vehicle speed sensor to confirm it is relaying accurate signals to the cruise control module, as a faulty sensor can disrupt functionality. Finally, inspect all wiring and connections related to the cruise control system for any signs of damage or looseness, as these can impede communication between components. By following these steps, you can effectively troubleshoot and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz R350?

When the cruise control in your 2006 Mercedes-Benz R350 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose and potentially fix the issue yourself. One frequent culprit is a faulty brake light switch, which may fail to signal the system when the brake pedal is pressed, thereby preventing cruise control from engaging. Additionally, issues with the speed sensor can lead to incorrect speed readings, causing the cruise control to disengage unexpectedly. Another area to inspect is for vacuum leaks, as these can disrupt the system's ability to maintain a steady speed. If these components check out, consider the cruise control module itself; a malfunction here can result in a complete failure to respond to commands. Lastly, don’t overlook electrical problems, such as blown fuses or damaged wiring, which can also hinder the cruise control's operation. By systematically checking these areas, you can effectively troubleshoot and resolve the issues with your vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2006 Mercedes-Benz R350?

When it comes to the non-functioning cruise control in a 2006 Mercedes-Benz R350, understanding the urgency of the situation is crucial for any DIY enthusiast. While the malfunction may not present an immediate safety hazard compared to more critical vehicle issues, it is still essential to address it promptly. Ignoring this problem could lead to further complications, particularly if the underlying cause is linked to other vital systems in the car. Moreover, a functioning cruise control system enhances driving comfort and fuel efficiency, making it a valuable feature for long trips. By taking the time to diagnose and repair the cruise control, you not only restore a convenient driving aid but also contribute to the overall performance and reliability of your vehicle. Therefore, while it may not be the top priority, addressing the non-functioning cruise control should be on your to-do list to ensure a safe and enjoyable driving experience.

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