2007 Mercedes-Benz CLK350 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2007 Mercedes-Benz CLK350

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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 2007 Mercedes-Benz CLK350 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 2007 Mercedes-Benz CLK350 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 non-functioning cruise control in a 2007 Mercedes-Benz CLK350?

To effectively diagnose the non-functioning cruise control in your 2007 Mercedes-Benz CLK350, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, test the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can hinder engagement. Following this, examine the speed sensors, as they play a crucial role in the cruise control system's functionality; any malfunction here could lead to significant issues. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into specific problems affecting the cruise control. Additionally, verify that the brake and clutch switches are functioning correctly, as these components are essential for activating the cruise control. Finally, inspect the wiring and connections associated with the cruise control system, as loose or damaged wiring can disrupt its operation. By methodically following these steps, you can accurately identify the root cause of the cruise control malfunction and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to stop working in a 2007 Mercedes-Benz CLK350?

When the cruise control in your 2007 Mercedes-Benz CLK350 stops functioning, it can be frustrating, but understanding the common problems can guide you in diagnosing the issue. One frequent culprit is a faulty brake light switch, which may fail to signal that the brake pedal is not engaged, thereby preventing the cruise control from activating. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to cruise control failure. Another potential problem is vacuum leaks within the system, which can hinder its overall performance. If these components check out, consider the cruise control module itself, as a defect here can also cause the system to malfunction. Lastly, don’t overlook electrical problems, such as blown fuses or wiring issues, which can significantly impact the operation of the cruise control. By systematically checking these areas, you can identify and resolve the issue, restoring functionality to your vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2007 Mercedes-Benz CLK350?

Addressing a non-functioning cruise control in a 2007 Mercedes-Benz CLK350 should be considered a priority for any DIY enthusiast. While it may not seem like an immediate emergency, the implications of ignoring this issue can be significant. A malfunctioning cruise control system not only diminishes the convenience of maintaining a steady speed, which is particularly beneficial during long drives, but it can also indicate deeper electronic or mechanical problems within the vehicle. This neglect could lead to further complications, potentially resulting in costly repairs or safety hazards on the road. Therefore, it is wise to conduct a thorough inspection of the cruise control system as soon as possible. By doing so, you can ensure that your vehicle remains safe and efficient, allowing you to enjoy the benefits of this feature without the worry of unexpected failures. Taking proactive steps to diagnose and repair the issue will not only enhance your driving experience but also safeguard your vehicle's overall performance.

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