2015 Mercedes-Benz S600 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 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 2015 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 2015 Mercedes-Benz S600?

When faced with a non-functional cruise control in a 2015 Mercedes-Benz S600, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse is a straightforward issue that can easily be resolved. Next, verify the functionality of the cruise control switch; if it’s faulty, it will prevent the system from engaging. Following this, examine the speed sensors, as they play a crucial role in the cruise control operation; any malfunction here can disrupt the system. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into underlying issues that may not be immediately visible. Lastly, inspect the wiring connections associated with the cruise control system, as loose or damaged wires can significantly impact functionality. By methodically addressing these areas, 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 2015 Mercedes-Benz S600?

When the cruise control in your 2015 Mercedes-Benz S600 stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is often a faulty brake light switch, which can prevent the cruise control from engaging if it fails to signal that the brake pedal is pressed. Additionally, issues with the speed sensor can lead to incorrect speed readings, causing the system to disengage unexpectedly. Another potential problem is a malfunctioning throttle actuator, which is crucial for maintaining a steady speed; if it fails, the cruise control will struggle to operate correctly. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the cruise control functionality, making it essential to check the vehicle's electrical system. Lastly, software glitches within the vehicle's control module may require a reset or reprogramming to restore proper operation. By systematically checking these components, you can identify and address the issue, potentially saving on repair costs and getting your cruise control back in working order.

How urgent is it to address the malfunctioning cruise control in a 2015 Mercedes-Benz S600?

Addressing a malfunctioning cruise control in your 2015 Mercedes-Benz S600 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unexpected acceleration or deceleration, significantly increasing the risk of accidents on the road. Moreover, the enjoyment and ease of driving are compromised when this feature does not function correctly, detracting from the overall driving experience. Ignoring these symptoms can also lead to more severe issues within the vehicle's systems, resulting in costly repairs down the line. Therefore, it is essential to prioritize the diagnosis and repair of your cruise control system to ensure both your safety and the longevity of your vehicle.

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