2006 Mercedes-Benz C350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Mercedes-Benz C350 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 C350 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 C350 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 steps to diagnose the cruise control issue in a 2006 Mercedes-Benz C350?

To effectively diagnose a cruise control issue in a 2006 Mercedes-Benz C350, it is essential to adopt a methodical approach that begins with the simplest checks before progressing to more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is often the most straightforward explanation for a malfunction. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning properly and are not stuck or damaged, as this can directly impact the system's operation. If these initial checks do not reveal any issues, utilize a diagnostic scanner to check for error codes that may indicate problems within the cruise control system. Following this, test the cruise control module to ensure it is sending signals correctly. Additionally, inspect the speed sensors to confirm they are providing accurate readings, as faulty sensors can disrupt the cruise control functionality. Finally, check the wiring and connections for any signs of damage or corrosion that could hinder performance. If these steps do not resolve the issue, consulting a professional mechanic may be necessary to ensure a comprehensive diagnosis and effective resolution of the problem.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz C350?

When troubleshooting the cruise control system in a 2006 Mercedes-Benz C350, it's crucial to identify the common issues that may lead to its malfunction. A primary concern is the brake light switch; if this component is faulty, it can prevent the cruise control from engaging, as the system is designed to deactivate when the brake pedal is pressed. Additionally, problems with the speed sensor can disrupt the system's ability to maintain the desired speed, since accurate speed readings are essential for proper operation. Vacuum leaks within the cruise control system can also significantly impair functionality, as they disrupt the necessary pressure for the system to work effectively. Furthermore, a defective cruise control module may be at fault, as it is integral to the system's overall performance. Lastly, electrical issues, including blown fuses or wiring problems, can severely impact the cruise control's operation. By understanding and addressing these common problems, DIY enthusiasts can effectively troubleshoot and restore the cruise control system in their Mercedes-Benz C350.

How urgent is it to address the non-functioning cruise control in a 2006 Mercedes-Benz C350?

When it comes to a non-functioning cruise control in your 2006 Mercedes-Benz C350, addressing the issue promptly is crucial for both safety and vehicle performance. While it may seem like a minor inconvenience, a malfunctioning cruise control system can signal deeper electronic or sensor problems that could affect other critical systems in your vehicle. This is particularly important on long drives where cruise control is typically utilized to reduce driver fatigue and enhance fuel efficiency. Ignoring the problem not only compromises your comfort but can also lead to increased fuel consumption as maintaining a consistent speed becomes more challenging. Moreover, the longer you wait to address the issue, the greater the risk of potential safety hazards arising from an unreliable system. Therefore, it is advisable to have the cruise control inspected and repaired by a qualified mechanic as soon as possible to ensure the optimal performance and safety of your vehicle. Taking swift action can prevent further complications and help maintain the reliability of your Mercedes-Benz C350.

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