2014 Mercedes-Benz GLK250 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2014 Mercedes-Benz GLK250

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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 2014 Mercedes-Benz GLK250 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 2014 Mercedes-Benz GLK250 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 2014 Mercedes-Benz GLK250?

When diagnosing the non-functioning cruise control in a 2014 Mercedes-Benz GLK250, it's essential to adopt a systematic approach that prioritizes simpler checks before delving into 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 directly affect functionality. Following this, check the speed sensors, which are critical for the cruise control system; any dirt or damage here can lead to malfunctions. Utilizing a diagnostic scanner to identify any error codes related to the cruise control system can provide valuable insights into underlying issues. Additionally, verify that the brake and clutch switches are operating correctly, as faulty switches can prevent the cruise control from engaging. A thorough inspection of the wiring and connections is also crucial, as loose connections or frayed wires can disrupt the system. Finally, test the cruise control module to confirm it is receiving power and functioning properly. By following this structured diagnostic approach, you can effectively identify the root cause of the cruise control malfunction and take appropriate steps for repair.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz GLK250?

When troubleshooting the cruise control system in a 2014 Mercedes-Benz GLK250, 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 prevent the cruise control from engaging since the system is designed to deactivate when the brake pedal is pressed. Additionally, speed sensor malfunctions can disrupt the system's ability to maintain a constant speed, leading to erratic behavior. Another critical component is the throttle actuator; if it fails, the cruise control may struggle to keep the vehicle at the desired speed. Furthermore, problems with the cruise control module itself, such as electrical faults or component failures, can render the system inoperative. Lastly, vacuum leaks in the engine can significantly impact the performance of the cruise control, causing it to stop working or behave unpredictably. By identifying and addressing these issues, you can effectively restore the cruise control functionality in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2014 Mercedes-Benz GLK250?

Addressing a malfunctioning cruise control in a 2014 Mercedes-Benz GLK250 is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control fails, it can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which can compromise the driver's ability to maintain control, especially on highways where consistent speed is essential. Ignoring these symptoms can escalate into more severe issues, potentially resulting in dangerous driving conditions that could endanger both the driver and others on the road. Therefore, it is imperative to act swiftly and seek professional assistance to diagnose and repair the cruise control system. By addressing these issues promptly, drivers can ensure their safety and the reliability of their vehicle, making it a crucial step in responsible vehicle maintenance.

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