2007 Mercedes-Benz ML350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2007 Mercedes-Benz ML350 and How to Fix Them

Find Repair Location
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 2007 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 2007 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 steps to diagnose the non-functioning cruise control in a 2007 Mercedes-Benz ML350?

To effectively diagnose the non-functioning cruise control in your 2007 Mercedes-Benz ML350, 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 fuse box, as a blown fuse is a common and easily fixable issue. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can prevent engagement. If these initial checks do not resolve the problem, utilize a diagnostic scanner to identify any error codes from the vehicle's onboard computer, which can provide insights into underlying issues. Following this, inspect the speed sensors on the wheels, as malfunctioning sensors can disrupt the cruise control function. Additionally, check the brake and clutch switches, since any malfunction here can disable the cruise control system. It’s also crucial to examine the wiring and connections for any signs of damage or looseness, as these can lead to malfunctions. Finally, if all previous steps yield no results, consider testing the cruise control module itself, as a defective module may require repair or replacement. By following this structured diagnostic approach, you can effectively identify and address the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2007 Mercedes-Benz ML350?

When troubleshooting cruise control issues in a 2007 Mercedes-Benz ML350, it's essential to consider several common problems that may be at play. A failed control module, sensor, or switch can disrupt the system's functionality, so checking these components should be a priority. Additionally, throttle actuation problems can prevent the cruise control from engaging properly, while a blown fuse may cut off power to the system entirely. The brake pedal switch is another critical element; if it's defective, it may signal that the brakes are engaged, thereby disabling cruise control. Furthermore, issues with the throttle itself or a malfunctioning speed sensor can also contribute to the problem. Lastly, a faulty camshaft adjuster solenoid may affect engine performance, indirectly impacting cruise control operation. By systematically examining these components, DIYers can effectively diagnose and potentially resolve cruise control issues in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2007 Mercedes-Benz ML350?

When it comes to the non-functioning cruise control in a 2007 Mercedes-Benz ML350, understanding the urgency of the situation is crucial for any DIY enthusiast. While the malfunction may not present an immediate safety hazard like failing brakes or steering, it is still important to address the issue promptly. A functioning cruise control system enhances driving comfort, particularly on long trips, by allowing the driver to maintain a steady speed, which can also contribute to better fuel efficiency. Ignoring this problem could lead to increased driver fatigue during extended drives, making it a nuisance rather than a critical safety concern. Moreover, delaying repairs might allow underlying issues to worsen, potentially leading to more significant and costly repairs down the line. Therefore, while the urgency may not be as high as with other mechanical failures, taking the time to diagnose and fix the cruise control system will ensure the vehicle remains in optimal condition and enhance the overall driving experience.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2007 Mercedes-Benz ML350 Cruise Control Issues & Repairs