2010 Mercedes-Benz ML350 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2010 Mercedes-Benz ML350

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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 2010 Mercedes-Benz ML350 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 2010 Mercedes-Benz ML350 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 troubleshoot the non-functional cruise control in a 2010 Mercedes-Benz ML350?

When troubleshooting the non-functional cruise control in a 2010 Mercedes-Benz ML350, it's crucial to follow a structured diagnostic approach that begins with the simplest checks. Start by inspecting the cruise control fuse in the fuse box; a blown fuse can easily disrupt the system's operation. Next, examine the cruise control switch on the steering wheel for any signs of damage or malfunction, as this component is essential for activating the system. Additionally, check the brake pedal switch, since a faulty switch can prevent the cruise control from engaging. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately apparent. Lastly, inspect the vacuum lines connected to the cruise control system for any leaks, as these can significantly impact its functionality. By systematically addressing these areas, you can effectively identify the cause of the cruise control malfunction and take the necessary steps to resolve the issue.

What are the common problems that could cause the cruise control to stop working in a 2010 Mercedes-Benz ML350?

When the cruise control in a 2010 Mercedes-Benz ML350 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control system as it disengages the cruise when the brake pedal is pressed. If this switch malfunctions, it may prevent the cruise control from engaging at all. Another potential issue is related to the speed sensor; if this component fails, the vehicle may struggle to maintain a constant speed, leading to cruise control failure. Additionally, vacuum leaks can disrupt the system's operation by affecting the engine's ability to sustain a steady speed, which is essential for cruise control functionality. A defective cruise control module can also be a significant factor, as it is responsible for controlling the system's operations. Lastly, electrical problems, such as blown fuses or wiring issues, can impede the cruise control's performance. By systematically checking these areas, you can effectively troubleshoot and potentially resolve the cruise control issues in your ML350, making it a manageable DIY project.

How urgent is it to address the non-functioning cruise control in a 2010 Mercedes-Benz ML350?

When it comes to the non-functioning cruise control in a 2010 Mercedes-Benz ML350, 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 issues with brakes or steering, it can still indicate deeper problems within the vehicle's electronic systems or sensors. This could lead to complications that affect other critical functions, making it essential to address the issue sooner rather than later. Additionally, a reliable cruise control system enhances driving comfort and fuel efficiency, particularly during long trips. Ignoring the problem could result in more extensive damage and costly repairs down the line, ultimately impacting the vehicle's overall performance. Therefore, while it may not be the highest priority, taking the time to diagnose and repair the cruise control system will ensure a safer and more enjoyable driving experience.

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2010 Mercedes-Benz ML350 Cruise Control Issues & Solutions