2012 Mercedes-Benz GLK350 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2012 Mercedes-Benz GLK350

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Reviewed by
Andrew Hajjar
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 2012 Mercedes-Benz GLK350 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 2012 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2012 Mercedes-Benz GLK350?

When troubleshooting the non-functioning cruise control in a 2012 Mercedes-Benz GLK350, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse located in the vehicle's fuse box, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent proper engagement. Following this, verify the functionality of the vehicle's speed sensor, which is critical for the cruise control system to operate correctly. Utilizing a diagnostic scanner to check for any error codes can provide valuable insights into underlying issues. Additionally, examine the brake and clutch switches, as faulty switches can inhibit cruise control activation. It's also wise to inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion. Finally, test the cruise control module to confirm it is receiving power and functioning as intended. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2012 Mercedes-Benz GLK350?

When the cruise control in your 2012 Mercedes-Benz GLK350 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 when the brake pedal is pressed. If this switch malfunctions, it may prevent the cruise control from engaging at all. Another potential issue could be related to the speed sensor; if it fails to provide accurate speed readings, the cruise control system cannot operate correctly. Additionally, vacuum leaks within the cruise control system can disrupt its functionality, leading to unexpected disengagements. A defective cruise control module may also be at fault, as it is responsible for controlling the system's operations. Lastly, electrical problems, such as blown fuses or damaged wiring, can significantly impact the cruise control's performance. By systematically checking these components, you can identify the root cause of the problem and take the necessary steps to restore your vehicle's cruise control functionality.

How urgent is it to repair the non-functioning cruise control on a 2012 Mercedes-Benz GLK350?

When evaluating the urgency of repairing the non-functioning cruise control on a 2012 Mercedes-Benz GLK350, it is essential to recognize that while this issue may not be as critical as malfunctioning brakes or airbags, it still warrants prompt attention. A malfunctioning cruise control system can lead to unexpected acceleration or deceleration, posing safety risks during long drives. Additionally, the absence of this feature can detract from driving comfort, particularly on highways where maintaining a steady speed is beneficial. Furthermore, neglecting to repair the cruise control could impact the vehicle's resale value, as potential buyers often look for well-maintained features. Therefore, addressing the cruise control issue in a timely manner is advisable to ensure a safer, more comfortable driving experience and to help preserve the overall value of your vehicle.

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