2018 Mercedes-Benz GLC63 AMG Cruise Control Isn't Working

Cruise Control Malfunctions in 2018 Mercedes-Benz GLC63 AMG and Fixes

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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 2018 Mercedes-Benz GLC63 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 2018 Mercedes-Benz GLC63 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 2018 Mercedes-Benz GLC63 AMG?

To effectively diagnose the cruise control issue in your 2018 Mercedes-Benz GLC63 AMG, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by examining the cruise control fuse, as a blown fuse is a common and easily fixable problem that can disrupt the system's functionality. Next, inspect the cruise control buttons on your steering wheel to ensure they are operational, since faulty buttons can prevent the system from engaging. If these initial checks do not reveal the issue, utilize an OBD-II scanner to identify any error codes that may indicate specific malfunctions within the cruise control system. Following this, assess the speed sensors, which are vital for the cruise control's operation; any faults here can lead to significant issues. Additionally, inspect the wiring connections associated with the cruise control system for any signs of damage or looseness, as compromised wiring can hinder performance. Finally, if all else checks out, test the cruise control module itself to confirm it is functioning correctly. By following this structured diagnostic approach, you can efficiently identify and address the underlying cause of your cruise control problems.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz GLC63 AMG?

When the cruise control in your 2018 Mercedes-Benz GLC63 AMG ceases to function, it’s essential to consider several common issues that could be at play. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge the vehicle's speed. If this sensor is malfunctioning, it may prevent the system from engaging or maintaining the desired speed. Additionally, the brake light switch can also be a source of trouble; since the cruise control relies on signals from the brake system, any issues here can disrupt its operation. Another potential problem lies with the throttle actuator, which is responsible for communicating with the engine. If this component is not functioning correctly, it can hinder the cruise control's ability to operate smoothly. Electrical problems, such as blown fuses or wiring issues, can further complicate matters, as they may interrupt the power supply to the cruise control module. Lastly, software glitches within the vehicle's onboard computer can also lead to cruise control malfunctions, often requiring a simple reset or software update to rectify. By systematically checking these areas, you can effectively troubleshoot and potentially restore the functionality of your cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2018 Mercedes-Benz GLC63 AMG?

Addressing a malfunctioning cruise control in a 2018 Mercedes-Benz GLC63 AMG is of utmost urgency due to the significant safety risks it poses. A faulty cruise control system can hinder the driver’s ability to maintain a steady speed, increasing the likelihood of accidents on the road. Moreover, such malfunctions may signal deeper issues within the vehicle's electronic systems or sensors, which could compromise other critical functions, leading to more severe problems down the line. Ignoring these symptoms not only jeopardizes safety but can also result in decreased fuel efficiency and a less enjoyable driving experience, as the cruise control system is designed to enhance comfort during long journeys. By promptly addressing the malfunction, you can prevent further damage to your vehicle, ultimately saving on costly repairs and ensuring a safer, more efficient driving experience. Therefore, it is advisable to take action as soon as you notice any issues with the cruise control system.

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