2013 Mercedes-Benz ML550 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2013 Mercedes-Benz ML550

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Reviewed by
Aisha
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 2013 Mercedes-Benz ML550 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 2013 Mercedes-Benz ML550 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 steps to diagnose the non-functioning cruise control in a 2013 Mercedes-Benz ML550?

To effectively diagnose the non-functioning cruise control in your 2013 Mercedes-Benz ML550, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse located in the vehicle's fuse box, as a blown fuse can often be the simplest explanation for the issue. Next, examine the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent the system from engaging. Following this, check the speed sensors on the wheels for any dirt or damage, since these sensors play a crucial role in the cruise control's functionality. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying electronic issues. Additionally, verify that the brake and clutch switches are functioning correctly, as these components can disable the cruise control when activated. Inspecting the wiring and connections for any signs of damage or looseness is also essential, as faulty wiring can disrupt the system. Finally, if these steps do not resolve the issue, testing the cruise control module may be necessary to determine if it requires replacement. If you find yourself unable to diagnose the problem after these checks, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable for further assistance. This structured approach not only helps in identifying the problem efficiently but also ensures that you cover all potential causes systematically.

What are the common problems that could cause the cruise control to stop working in a 2013 Mercedes-Benz ML550?

When troubleshooting the cruise control system in a 2013 Mercedes-Benz ML550, it's essential to understand the common problems that may lead to its failure. One prevalent issue is a faulty brake light switch, which can disrupt the system's ability to engage by failing to signal that the brakes are not applied. Additionally, speed sensor problems can result in inaccurate readings, causing the cruise control to malfunction or disengage unexpectedly. Another critical component is the throttle actuator; if it malfunctions, the vehicle may struggle to maintain a constant speed, directly impacting cruise control functionality. Electrical issues, such as blown fuses or wiring problems, can also hinder the system's operation. Lastly, vacuum leaks in the engine can interfere with the cruise control's ability to maintain speed effectively. By identifying and addressing these common issues, you can restore the cruise control functionality in your vehicle, ensuring a smoother driving experience.

How urgent is it to address the non-functioning cruise control in a 2013 Mercedes-Benz ML550?

When it comes to the non-functioning cruise control in a 2013 Mercedes-Benz ML550, understanding the urgency of the situation is crucial for any DIY enthusiast. While a malfunctioning cruise control may not pose an immediate safety risk like brake or steering failures, it can indicate deeper issues within the vehicle's electronic systems or sensors. Ignoring this problem could lead to increased fuel consumption during long drives, resulting in both financial and comfort-related drawbacks. Moreover, a malfunctioning cruise control can detract from the overall driving experience, making long trips more tiring and less enjoyable. Therefore, it is advisable to address this issue promptly to maintain optimal vehicle performance and ensure a comfortable driving experience. Taking the time to diagnose and repair the cruise control system not only enhances convenience but also prevents potential complications that could arise from neglecting the problem.

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2013 Mercedes-Benz ML550 Cruise Control Issues & Repairs