2014 Mercedes-Benz GLK350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2014 Mercedes-Benz GLK350 and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2014 Mercedes-Benz GLK350 cruise control isn't working are failed control module, sensor or switch issues, or throttle actuation problems.
  • Sensor: A faulty sensor can lead to incorrect readings, causing issues with engine performance or triggering warning lights on the dashboard.
  • Control Module: A faulty control module can result in 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 acceleration and poor engine 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 2014 Mercedes-Benz GLK350 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 initial checks should I perform for cruise control issues in a 2014 Mercedes-Benz GLK350?

When troubleshooting cruise control issues in your 2014 Mercedes-Benz GLK350, start with the simplest checks to identify potential problems. Begin by inspecting the brake pedal switch, as a malfunctioning switch is a frequent culprit behind cruise control failures. Next, ensure that your vehicle's battery is fully charged, since a dead battery can disrupt the cruise control system's functionality. It's also important to examine the ABS wheel speed sensor for any faults, as this component plays a critical role in the operation of cruise control. Pay attention to any warning lights on your dashboard, particularly the ESP and ABS indicators, which may signal issues with the ABS sensor that could affect cruise control. Additionally, check for blown fuses, faulty brake lights, or a defective brake switch, as these are common issues that can prevent cruise control from engaging. If you notice a check engine light or any engine-related problems, address these promptly, as they may also contribute to the malfunction. By following these initial diagnostic steps, you can effectively narrow down the potential causes of cruise control issues before considering professional assistance for more complex repairs.

What common issues cause cruise control failure in a 2014 Mercedes-Benz GLK350?

When dealing with cruise control failure in a 2014 Mercedes-Benz GLK350, it's important to understand the common issues that may be at play. One frequent culprit is a failed control module, which can disrupt the communication between the cruise control system and the vehicle's computer. Additionally, problems with sensors or switches, such as a defective brake pedal switch, can prevent the cruise control from engaging properly. Throttle actuation issues may also arise, affecting the system's ability to maintain speed. Furthermore, a dead battery can lead to electrical failures that impact various systems, including cruise control. Lastly, a faulty ABS wheel speed sensor can send incorrect data to the vehicle's computer, causing the cruise control to malfunction. By identifying these potential issues, DIY enthusiasts can take the necessary steps to diagnose and fix their cruise control problems, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2014 Mercedes-Benz GLK350?

Addressing a malfunctioning cruise control system in a 2014 Mercedes-Benz GLK350 is of utmost importance due to the immediate safety risks it poses. A faulty cruise control can lead to erratic speed changes, increasing the likelihood of accidents and compromising the safety of both the driver and passengers. Additionally, cruise control significantly enhances driving comfort, especially during long journeys, and a malfunction can detract from this experience, making trips less enjoyable. Beyond comfort and safety, neglecting this issue can lead to more severe vehicle performance problems, as underlying issues may go unaddressed, potentially resulting in costly repairs down the line. Promptly diagnosing and fixing the cruise control system not only ensures a smoother driving experience but also prevents further damage to related components, safeguarding the vehicle's overall functionality. Therefore, it is crucial to prioritize the repair of a malfunctioning cruise control system to maintain safety, comfort, and vehicle integrity.

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2014 Mercedes-Benz GLK350 Cruise Control Issues & Solutions