2021 Mercedes-Benz S63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Mercedes-Benz S63 AMG

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Reviewed by
Devin Cabugcal
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 2021 Mercedes-Benz S63 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 2021 Mercedes-Benz S63 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 are the initial diagnostic steps to take when the cruise control isn't working on a 2021 Mercedes-Benz S63 AMG?

When faced with a malfunctioning cruise control system in your 2021 Mercedes-Benz S63 AMG, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can be a straightforward fix that restores functionality. Next, inspect the cruise control buttons on the steering wheel; ensure they are responsive and not stuck, as this can prevent the system from engaging. Following this, verify the speed sensors, which play a crucial role in relaying speed data to the cruise control system; any faults here can lead to operational issues. Utilizing a diagnostic scanner to check for error codes can provide insights into specific problems affecting the system. Additionally, examine the brake and clutch switches, as these components are designed to disengage cruise control when the pedals are pressed, and any malfunction could disrupt the system. Lastly, inspect the wiring and connections for signs of damage or corrosion, as faulty wiring can impede communication between the cruise control components. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issues in your vehicle before seeking professional help.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz S63 AMG?

When troubleshooting the cruise control system in a 2021 Mercedes-Benz S63 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, the brake light switch plays a crucial role; if it malfunctions, it can send incorrect signals to the cruise control system, causing it to fail. Another potential culprit is the throttle actuator, which is responsible for regulating engine communication with the cruise control system; any issues here can hinder proper functionality. Furthermore, a defective cruise control module may completely disable the system, necessitating repair or replacement. Lastly, electrical problems such as wiring faults or blown fuses can also impede the cruise control's operation. By identifying and addressing these common issues, DIY enthusiasts can effectively diagnose and potentially resolve cruise control problems in their vehicle.

How urgent is it to address the malfunctioning cruise control in a 2021 Mercedes-Benz S63 AMG?

When it comes to a malfunctioning cruise control in your 2021 Mercedes-Benz S63 AMG, the urgency to address the issue cannot be overstated. A faulty cruise control system can significantly compromise your vehicle's ability to maintain a steady speed, which is particularly concerning during long drives or on highways where consistent speed is crucial for safety and fuel efficiency. Ignoring this problem not only increases the risk of accidents but can also lead to more severe complications within the vehicle's electronic systems, resulting in costly repairs down the line. Therefore, it is essential to consult a qualified mechanic or an authorized Mercedes-Benz service center as soon as you notice any irregularities. Prompt action ensures that your vehicle remains safe to drive and operates at its best, preventing further damage and enhancing your overall driving experience.

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2021 Mercedes-Benz S63 AMG Cruise Control Issues & Repairs