2016 Mercedes-Benz GLC300 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Mercedes-Benz GLC300 and How to Fix Them

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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 2016 Mercedes-Benz GLC300 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 2016 Mercedes-Benz GLC300 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 steps should I take to diagnose the cruise control issue in my 2016 Mercedes-Benz GLC300?

When diagnosing the cruise control issue in your 2016 Mercedes-Benz GLC300, 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, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to engagement problems. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into specific issues affecting the cruise control system. Additionally, verify the speed sensors, as they are critical for the system's performance; any malfunction here can hinder cruise control operation. It's also important to check the brake and clutch switches, as these components must function correctly for the cruise control to engage. Lastly, inspect the wiring and connections for any signs of damage or corrosion, which can lead to connectivity issues. If these steps do not resolve the problem, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is advisable for a comprehensive diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2016 Mercedes-Benz GLC300?

When the cruise control in your 2016 Mercedes-Benz GLC300 ceases to function, several common problems may be at play. One of the first areas to investigate is the brake pedal switch, as a defective switch can inadvertently signal that the brakes are engaged, disabling the cruise control. Additionally, a dead battery or a blown fuse can disrupt the electrical system, leading to a failure in cruise control operation. It's also essential to check for any throttle issues, as problems with the throttle can prevent the system from maintaining speed. Furthermore, a faulty brake light or a malfunctioning brake switch can create similar issues, as these components are integral to the cruise control's functionality. Lastly, if the check engine light is illuminated, it may indicate underlying engine-related problems that could affect the cruise control system. By systematically examining these components, you can identify and potentially resolve the issue, restoring your vehicle's cruise control functionality.

How urgent is it to address the malfunctioning cruise control in my 2016 Mercedes-Benz GLC300?

Addressing a malfunctioning cruise control system in your 2016 Mercedes-Benz GLC300 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents. Beyond safety, neglecting this issue can adversely affect your vehicle's performance, leading to further complications and costly repairs down the line. Additionally, maintaining the functionality of your cruise control is essential for preserving the overall condition and resale value of your vehicle. By addressing the malfunction promptly, you ensure a safer driving experience, optimal vehicle performance, and protect your investment in the long run.

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