2018 Mercedes-Benz C63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Mercedes-Benz C63 AMG and How to Fix Them

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Reviewed by
Aisha
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 C63 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 C63 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 non-functioning cruise control in my 2018 Mercedes-Benz C63 AMG?

To effectively diagnose the non-functioning cruise control in your 2018 Mercedes-Benz C63 AMG, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. Following this, verify the functionality of the speed sensors, since faulty sensors can disrupt the cruise control operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are functioning correctly, as malfunctioning switches can disable the cruise control. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as these can lead to operational failures. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz C63 AMG?

When troubleshooting the cruise control system in a 2018 Mercedes-Benz C63 AMG, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can interfere with the cruise control's operation, as the system relies on signals from the brake system to function correctly. Another potential culprit is a malfunctioning throttle actuator, which can hinder the cruise control's ability to adjust the throttle position effectively. Furthermore, a defective cruise control module may result in the system failing to respond to user commands or maintain the set speed. Lastly, various electrical problems, such as wiring issues or blown fuses, can also contribute to the cruise control's failure. By identifying and addressing these common issues, DIY enthusiasts can take the first steps toward restoring the cruise control functionality in their vehicle.

How urgent is it to address the malfunctioning cruise control in my 2018 Mercedes-Benz C63 AMG?

When it comes to your 2018 Mercedes-Benz C63 AMG, the urgency of addressing a malfunctioning cruise control system cannot be overstated. A malfunction in this feature can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk not only to you but also to other road users. Moreover, a faulty cruise control can detract from the overall driving experience, making it less convenient and enjoyable to use. Ignoring these symptoms may lead to further complications, potentially causing damage to other vehicle systems and resulting in costly repairs down the line. By promptly addressing the issue, you not only ensure your safety but also maintain the optimal performance and efficiency of your vehicle, preserving its value and reliability. Therefore, it is crucial to take action as soon as you notice any irregularities with your cruise control system.

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