2018 Mercedes-Benz S560 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Mercedes-Benz S560 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2018 Mercedes-Benz S560 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 2018 Mercedes-Benz S560 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2018 Mercedes-Benz S560?

When troubleshooting the non-functional cruise control in a 2018 Mercedes-Benz S560, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse in the fuse box, as a blown fuse can easily disrupt the system. Next, ensure that the cruise control settings on the dashboard are correctly configured, as incorrect settings can prevent activation. If these initial checks do not resolve the issue, use a diagnostic scanner to look for any error codes that may indicate specific problems within the cruise control system. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these can directly affect functionality. If everything appears intact, test the cruise control module to confirm it is operating correctly. Lastly, verify the functionality of the vehicle speed sensor, as it is essential for the cruise control to engage properly. By following these steps, you can effectively diagnose and potentially resolve the issues with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz S560?

When troubleshooting the cruise control system in a 2018 Mercedes-Benz S560, it's essential to understand the common problems that may lead to its failure. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it may not signal the cruise control system to disengage when the brake pedal is pressed, leading to operational issues. Another potential culprit is the throttle actuator, which controls the engine's throttle opening; any malfunction here can hinder the cruise control's ability to sustain a constant speed. Electrical problems, such as blown fuses or wiring issues, can also impede the system's functionality, as can software glitches within the vehicle's control module. By identifying and addressing these common problems, DIY enthusiasts can effectively restore the cruise control system's functionality, ensuring a smoother driving experience.

How urgent is it to address the non-functioning cruise control in a 2018 Mercedes-Benz S560?

When it comes to a non-functioning cruise control in a 2018 Mercedes-Benz S560, the urgency of addressing the issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks and potential damage to your vehicle. Cruise control is designed to enhance your driving experience by maintaining a consistent speed, which not only reduces driver fatigue during long journeys but also contributes to better fuel efficiency. However, if the system is malfunctioning, it could signal deeper issues within the vehicle's electronic or mechanical systems that require attention. Ignoring these symptoms may result in more severe complications down the line, such as erratic vehicle behavior or even complete system failure. Therefore, it is advisable for DIY enthusiasts to diagnose the problem promptly, as this proactive approach not only ensures the safe operation of the vehicle but also helps prevent costly repairs in the future. Taking the time to investigate and resolve the cruise control issue will ultimately contribute to a safer and more enjoyable driving experience.

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