Mercedes-Benz S63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz S63 AMG and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 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 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

Troubleshooting Cruise Control Issues in a Mercedes-Benz S63 AMG

When troubleshooting cruise control issues in your Mercedes-Benz S63 AMG, it's essential to adopt a systematic diagnostic approach. Begin by checking the simplest components, such as the brake lights and brake switch, as these can often be the culprits behind cruise control malfunctions. A blown fuse or faulty brake light can disrupt the system without triggering warning lights, making them easy to overlook. Next, inspect the ABS wheel speed sensors, as a malfunction in any of these sensors can lead to cruise control failure. If these initial checks do not resolve the issue, consider using diagnostic tools to delve deeper into the system. These tools can help identify defective components like the control module or throttle sensor, which may require replacement. Additionally, be aware of any advanced features like Active Distance Assist Distronic, as problems in these systems can also impact cruise control functionality. By following this structured approach, you can effectively diagnose and address the common issues affecting your vehicle's cruise control system.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz S63 AMG?

When dealing with cruise control malfunctions in a Mercedes-Benz S63 AMG, it's crucial to recognize the common problems that may arise. A failed control module, sensor, or switch can disrupt the system's functionality, often requiring replacement to restore proper operation. Additionally, issues with throttle actuation can prevent the cruise control from engaging or maintaining speed. For those with the Distronic Plus feature, faulty radar or damaged sensors are frequent culprits that may necessitate repair or replacement. Wiring or circuit issues can also lead to malfunctions, so a thorough inspection of the wiring is essential. Furthermore, defective brake pedal switches can interfere with the cruise control's operation, as the system relies on accurate signals from these components. Lastly, underlying engine or transmission problems can cause the cruise control to disengage for safety reasons. To effectively diagnose the issue, using a diagnostic scanner and performing a visual inspection of the cruise control components is recommended. Regular maintenance and prompt repairs can significantly enhance the reliability of the cruise control system in your S63 AMG, ensuring a smoother driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz S63 AMG?

When the cruise control in your Mercedes-Benz S63 AMG is not functioning, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and further complications. Common culprits include ABS sensor failure, which can disable not only the cruise control but also essential safety features like ABS and stability control. A defective brake pedal switch is another frequent cause, as it can prevent the cruise control from engaging, leaving you without this convenient feature. Additionally, issues with the throttle control system can disrupt cruise control functionality, while older models may suffer from broken vacuum lines that directly affect the system's operation. Lastly, ensure that the cruise control is correctly selected; if the Variable Speedtronic indicator is lit, the system will not engage until properly set. By diagnosing these potential problems early, you can avoid more significant repairs and ensure a safer driving experience.

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