2012 Mercedes-Benz S600 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Mercedes-Benz S600 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 2012 Mercedes-Benz S600 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 S600 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2012 Mercedes-Benz S600?

When faced with a non-functional cruise control in a 2012 Mercedes-Benz S600, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the cruise control switch on the steering wheel for any visible damage or wear, ensuring it operates correctly. Speed sensors are vital for the cruise control system's functionality, so verify their operation as well. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are functioning properly, as these components are designed to disengage the cruise control when either pedal is pressed. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for signs of damage, corrosion, or loose connections. By following these steps, you can effectively diagnose 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 2012 Mercedes-Benz S600?

When troubleshooting the cruise control system in a 2012 Mercedes-Benz S600, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake light switch, which can disrupt the system's ability to engage by failing to signal when the brake pedal is pressed. Additionally, issues with the speed sensor can prevent the cruise control from receiving accurate speed readings, essential for maintaining a constant speed. Another potential problem is a malfunctioning throttle actuator, which directly affects the system's capability to control the vehicle's speed. Furthermore, vacuum leaks within the engine can compromise the performance of the cruise control, leading to erratic behavior or complete failure. Lastly, a defective cruise control module can also be responsible for the system's inability to function correctly. By identifying and addressing these issues, DIY enthusiasts can effectively diagnose and potentially resolve cruise control problems in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2012 Mercedes-Benz S600?

When it comes to the non-functioning cruise control in a 2012 Mercedes-Benz S600, the urgency of addressing this issue cannot be overstated. While it may seem like a minor inconvenience, neglecting this problem can lead to significant safety risks, especially during long drives where maintaining a steady speed is crucial. A malfunctioning cruise control system may be symptomatic of deeper electronic or sensor issues that could compromise other vehicle functions, potentially leading to more extensive and costly repairs down the line. For DIY enthusiasts, it’s essential to recognize that timely intervention not only enhances your driving experience by improving fuel efficiency and reducing fatigue but also safeguards against the risk of accidents caused by sudden speed fluctuations. Therefore, if you notice any irregularities with your cruise control, it’s advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose and resolve the issue promptly, ensuring both your safety and the longevity of your vehicle.

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