2017 Mercedes-Benz GLC43 AMG Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2017 Mercedes-Benz GLC43 AMG

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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 2017 Mercedes-Benz GLC43 AMG 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 2017 Mercedes-Benz GLC43 AMG 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 2017 Mercedes-Benz GLC43 AMG?

When diagnosing the cruise control issue in your 2017 Mercedes-Benz GLC43 AMG, it's essential to adopt a systematic approach that begins with the simplest checks before progressing to more complex diagnostics. Start by examining the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, inspect 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 is a crucial step, as it can reveal specific issues within the cruise control system. Additionally, verify the speed sensors, as they are vital for maintaining the desired speed; any malfunction here can directly affect cruise control performance. Don’t overlook the brake and clutch switches, as these components must function correctly for the cruise control to engage. Lastly, inspect the wiring connections for any signs of damage or loose connections that could hinder communication between the system's components. If these initial checks do not resolve the issue, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable for a comprehensive diagnosis and repair. This methodical approach not only helps in identifying the problem efficiently but also ensures that you cover all potential causes of the malfunction.

What are the common problems that could cause the cruise control to malfunction in a 2017 Mercedes-Benz GLC43 AMG?

When diagnosing cruise control malfunctions in a 2017 Mercedes-Benz GLC43 AMG, it's crucial to understand the common problems that may arise. A faulty speed sensor is often at the forefront, as it plays a vital role in relaying the vehicle's speed to the cruise control system; if it fails, the system cannot maintain a steady speed. Additionally, issues with the brake light switch can hinder the cruise control from engaging or disengaging, leading to unexpected behavior. The throttle actuator is another critical component; if it malfunctions, the system may struggle to adjust the vehicle's speed accurately. Electrical problems, such as damaged wiring or blown fuses, can also disrupt the cruise control's functionality. Lastly, software glitches within the vehicle's control module can create erratic behavior in the cruise control system. Addressing these issues promptly is essential for ensuring the cruise control operates smoothly and safely.

How urgent is the repair for the non-functioning cruise control in a 2017 Mercedes-Benz GLC43 AMG?

When assessing the urgency of repairing the non-functioning cruise control in your 2017 Mercedes-Benz GLC43 AMG, it's essential to weigh several factors. Safety is paramount; while cruise control enhances comfort on long drives, it is not critical for vehicle operation. If you can maintain a safe speed manually, the repair may not be urgent. However, if you rely on this feature for a more enjoyable driving experience, prioritizing the repair could be beneficial. Additionally, consider the impact on resale value; addressing the malfunction can make your vehicle more appealing to potential buyers. A professional diagnostic check is also advisable, as the urgency may vary based on the underlying issue, which could range from a minor fix to a more serious concern. Ultimately, your personal driving habits and preferences will guide your decision on how quickly to address the cruise control malfunction.

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