2021 Mercedes-Benz S580 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Mercedes-Benz S580

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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 2021 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 2021 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2021 Mercedes-Benz S580?

When faced with a non-functioning cruise control in your 2021 Mercedes-Benz S580, start by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can disrupt the system's operation. Next, ensure that the cruise control settings are correctly configured on your dashboard and steering wheel controls, as incorrect settings can prevent engagement. If these initial checks do not resolve the issue, inspect the speed sensors, as faulty sensors can hinder the cruise control from functioning properly. Utilizing a diagnostic scanner to scan for error codes can provide valuable insights into any underlying problems that may not be immediately visible. Additionally, test the cruise control switches on the steering wheel to confirm they are operational and effectively communicating with the cruise control module. Finally, examine the wiring connections associated with the cruise control system for any loose or damaged connections that could be affecting performance. By systematically 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 2021 Mercedes-Benz S580?

When troubleshooting the cruise control system in a 2021 Mercedes-Benz S580, it's essential to understand the common problems that may lead to its malfunction. 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, problems with the brake light switch can interfere with the cruise control's operation, as this switch is crucial for disengaging the system when the brake pedal is pressed. Another potential culprit is a malfunctioning throttle actuator, which is responsible for controlling the engine's throttle opening; if it fails, the cruise control may struggle to maintain speed. Furthermore, a defective cruise control module can hinder the system's overall functionality, making it unable to engage properly. Lastly, electrical issues such as wiring problems or blown fuses can also contribute to the cruise control's failure. By identifying and addressing these common issues, you can effectively restore the cruise control functionality in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2021 Mercedes-Benz S580?

Addressing a malfunctioning cruise control in your 2021 Mercedes-Benz S580 is not just a matter of convenience; it is a critical safety concern that demands immediate attention. A malfunction can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which significantly increases the risk of accidents on the road. Ignoring these symptoms can result in more than just a dangerous driving experience; it may also lead to further damage to the vehicle's systems, ultimately resulting in more extensive and costly repairs. To ensure both your safety and the longevity of your vehicle, it is advisable to consult a certified mechanic or an authorized Mercedes-Benz service center as soon as you notice any issues with the cruise control. Taking prompt action not only safeguards your well-being but also enhances the overall performance of your vehicle, making it a wise investment in the long run.

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2021 Mercedes-Benz S580 Cruise Control Issues & Solutions