2012 Mercedes-Benz CL600 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Mercedes-Benz CL600 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
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25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2012 Mercedes-Benz CL600 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 2012 Mercedes-Benz CL600 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2012 Mercedes-Benz CL600?

When troubleshooting the non-functional cruise control in a 2012 Mercedes-Benz CL600, it's important to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the cruise control fuse in the fuse box, as a blown fuse can easily disrupt the system's operation. Next, verify the functionality of the cruise control switch; if it’s faulty, it may need replacement. It's also essential to check the speed sensors, which are critical for providing accurate data to the cruise control system, as any malfunction here can lead to operational issues. Utilizing a diagnostic scanner to retrieve error codes from the vehicle's computer can provide valuable insights into potential problems. Additionally, examine the wiring and connections related to the cruise control system for any signs of damage or corrosion, as compromised wiring can hinder performance. Lastly, ensure that the brake and clutch switches are functioning properly, as these components are vital for disengaging the cruise control when necessary. By systematically addressing these areas, you can effectively diagnose and resolve the issues affecting the cruise control system in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2012 Mercedes-Benz CL600?

When troubleshooting the cruise control system in a 2012 Mercedes-Benz CL600, it's essential to understand the common problems that may lead to its failure. One of the primary issues could be a faulty brake light switch, which is crucial for signaling that the brakes are not engaged; if this switch malfunctions, the cruise control may not activate. Additionally, speed sensor issues can result in incorrect speed readings, causing the system to disengage unexpectedly. Another potential culprit is a malfunctioning throttle actuator, which is responsible for maintaining a steady speed; if it fails, the cruise control may struggle to perform its function. Furthermore, vacuum leaks in the engine can disrupt the necessary vacuum supply for the cruise control system, leading to operational problems. Lastly, a defective cruise control module can also be a significant factor, as it directly controls the cruise control's functionality. By identifying these common issues, DIY enthusiasts can better diagnose and address the problems affecting their vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in my 2012 Mercedes-Benz CL600?

Addressing the malfunctioning cruise control in your 2012 Mercedes-Benz CL600 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. Ignoring cruise control issues can lead to significant complications, especially during long drives where the system is most beneficial. A malfunctioning cruise control can result from various factors, including a blown fuse, faulty brake light, or issues with the control module or throttle actuation. If left unresolved, these problems could escalate, potentially leading to more severe damage or even compromising your vehicle's safety features. Therefore, it is essential to diagnose and fix these issues promptly, utilizing repair manuals or consulting with a service team to ensure your driving experience remains safe and enjoyable. Taking action now can prevent further complications down the road, making it imperative to address any symptoms of malfunction as soon as they arise.

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