2016 Mercedes-Benz S550 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2016 Mercedes-Benz S550

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Reviewed by
Bo Fader
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 2016 Mercedes-Benz S550 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 2016 Mercedes-Benz S550 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 take when the cruise control isn't working on a 2016 Mercedes-Benz S550?

When faced with a malfunctioning cruise control system in a 2016 Mercedes-Benz S550, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse is a straightforward issue that can easily disrupt functionality. Next, inspect the cruise control buttons on the steering wheel; if they are unresponsive, they may need repair or replacement. Following this, verify the speed sensors, as they play a crucial role in the cruise control system's operation. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying electronic issues. Additionally, ensure that the brake lights are functioning correctly, since a faulty brake light switch can inadvertently disable the cruise control. Lastly, examine the throttle position sensor, as its proper functioning is vital for the cruise control to operate smoothly. By methodically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue on your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2016 Mercedes-Benz S550?

When troubleshooting the cruise control system in a 2016 Mercedes-Benz S550, 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 detect the vehicle's speed accurately, preventing it from engaging or maintaining speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it can send incorrect signals to the cruise control system, causing it to fail. Another potential culprit is the throttle actuator, which controls the engine's throttle opening; any issues here can hinder the cruise control's performance. Electrical problems, such as faulty wiring or blown fuses, can also impact the system's functionality. Lastly, vacuum leaks in the engine can affect the cruise control's operation, as it relies on vacuum pressure to function correctly. 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 2016 Mercedes-Benz S550?

Addressing a malfunctioning cruise control in a 2016 Mercedes-Benz S550 is of utmost importance due to the potential safety risks it poses. A faulty cruise control system can hinder the driver’s ability to maintain a steady speed, increasing the likelihood of accidents on the road. Moreover, neglecting this issue may lead to more severe complications, as the underlying problems could affect other vehicle components, resulting in costly repairs down the line. By prioritizing the repair of the cruise control system, drivers not only enhance their safety but also ensure a smoother driving experience for themselves and their passengers. Therefore, it is crucial to act swiftly to resolve any cruise control malfunctions to maintain the vehicle's performance and safety standards.

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2016 Mercedes-Benz S550 Cruise Control Issues & Repairs