2020 Mercedes-Benz C63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2020 Mercedes-Benz C63 AMG

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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 2020 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 2020 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 cruise control issue in my 2020 Mercedes-Benz C63 AMG?

When diagnosing the cruise control issue in your 2020 Mercedes-Benz C63 AMG, it's essential to adopt a systematic approach that begins with the simplest solutions before progressing to more complex diagnostics. Start by checking the cruise control fuse, as a blown fuse can often be the root cause of the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are functioning correctly, as faulty buttons can disrupt the system's operation. Utilizing an OBD-II scanner to check for error codes can provide valuable insights into any underlying issues, allowing you to pinpoint specific problems. Additionally, verify that the speed sensors are operational, as they are critical for maintaining the desired speed. Don't overlook the importance of examining wiring connections for any damage or loose ends, as these can significantly impact the cruise control's performance. If these steps do not resolve the issue, it may be time to consult a professional mechanic or an authorized Mercedes-Benz service center, where experts can provide a thorough diagnosis and repair. By following this structured diagnostic approach, you can effectively identify and address the cruise control issues in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz C63 AMG?

When the cruise control in your 2020 Mercedes-Benz C63 AMG 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 speed sensor, which is crucial for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another frequent issue arises from the brake light switch; if this switch is defective, it may not signal the cruise control system to disengage when the brake pedal is pressed, leading to operational failures. Additionally, a malfunctioning throttle actuator can hinder the system's ability to control the engine's throttle, impacting speed maintenance. Electrical problems, such as blown fuses or wiring issues, can also disrupt the cruise control's functionality, as can software glitches within the vehicle's onboard computer. By systematically checking these components, you can often identify and rectify the problem, restoring your cruise control to its intended performance.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz C63 AMG?

Addressing a malfunctioning cruise control in a 2020 Mercedes-Benz C63 AMG is crucial for both safety and vehicle performance. When cruise control fails, it can hinder your ability to maintain a steady speed, increasing the risk of accidents, especially during long drives or on highways. Additionally, such issues may signal deeper electronic or sensor problems that could affect other vehicle functions, leading to more significant repairs down the line. For DIY enthusiasts, it’s essential to recognize that neglecting these symptoms not only compromises your driving comfort but can also escalate repair costs if the underlying issues worsen. Therefore, if you notice any irregularities with your cruise control, it’s advisable to diagnose and address the problem promptly, ensuring your vehicle remains safe and reliable on the road.

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