Mercedes-Benz S580 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz S580 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 Mercedes-Benz S580 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 Mercedes-Benz S580 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz S580

When troubleshooting cruise control issues in a Mercedes-Benz S580, it's essential to adopt a systematic diagnostic approach that begins with the simplest potential problems before delving into more complex ones. Start by inspecting the cruise control button on the steering wheel for any dirt or damage that could hinder its functionality. If the button appears clean and intact, check the electrical connections and wiring for any signs of wear or disconnection, as these can often lead to malfunctions. Next, assess the control module, sensors, and switches, as failures in these components are common culprits behind cruise control issues. If these elements are functioning correctly, investigate the throttle actuation system, ensuring it operates smoothly without any obstructions. Additionally, consider the ABS wheel speed sensors, as a failure in any of these can disrupt the cruise control system due to its interdependence with other vehicle systems. Lastly, if all else fails, examine the spiral cable within the steering wheel, as issues here can prevent effective communication between the cruise control switch and the system. By following this methodical approach, you can effectively diagnose and resolve cruise control problems in your Mercedes-Benz S580.

What Could Cause Cruise Control Malfunctions in a Mercedes-Benz S580?

When diagnosing cruise control malfunctions in a Mercedes-Benz S580, it's crucial to understand the common problems that may be affecting the system's performance. One of the primary issues could be malfunctioning speed sensors, which are vital for the cruise control to maintain the desired speed. If these sensors, located on each wheel and within the transmission, fail, the cruise control may not engage or function correctly. Additionally, a defective brake pedal switch can prevent the system from activating, as it signals when the brakes are applied. Electrical issues, such as a faulty spiral cable in the steering wheel, can disrupt communication between the cruise control system and the vehicle's electrical components, leading to malfunctions. It's also wise to check for blown fuses, as these can interrupt the power supply to the cruise control system. Lastly, problems with the brake light or brake switch can further complicate the situation, as they are integral to the cruise control's operation. To effectively troubleshoot these issues, utilizing a diagnostic scanner, performing visual inspections, and testing the cruise control components are essential steps in identifying and resolving the underlying problems.

Why is the Cruise Control Not Working in a Mercedes-Benz S580?

When the cruise control in your Mercedes-Benz S580 is not functioning, it is crucial to address the issue promptly, as neglecting it can lead to significant safety risks and further complications. A malfunctioning cruise control system may be indicative of underlying problems, such as a faulty ABS sensor or a defective brake pedal switch, both of which can affect the vehicle's overall stability and braking performance. If the ABS sensor fails, it not only disables cruise control but can also compromise other essential systems like stability control, increasing the risk of accidents. Additionally, a blown fuse or issues with the throttle control system can exacerbate the situation, potentially leading to more extensive repairs down the line. Therefore, it is advisable to have the vehicle's diagnostic codes read as soon as possible to identify the root cause of the problem. By addressing these symptoms early, you can ensure your vehicle remains safe to drive and avoid costly repairs in the future.

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