Mercedes-Benz CLS63 AMG S Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz CLS63 AMG S and How to Fix Them

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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 Mercedes-Benz CLS63 AMG S 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 CLS63 AMG S 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.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

Troubleshooting Cruise Control Issues in a Mercedes-Benz CLS63 AMG S

When troubleshooting cruise control issues in your Mercedes-Benz CLS63 AMG S, it's essential to adopt a methodical diagnostic approach. Start by inspecting the brake pedal switch, as a defective switch is a common culprit for cruise control malfunctions. Next, check the ABS wheel speed sensor, which can not only disrupt cruise control functionality but also trigger warning lights for the ESP and ABS systems. A blown fuse can also be a straightforward fix, so examine the fuse box for any blown fuses related to the cruise control system. Additionally, ensure that your brake lights are functioning correctly, as a faulty brake light or switch can interfere with cruise control operation. If these initial checks do not resolve the issue, consider any engine-related problems, particularly if the check engine light is illuminated, as these can prevent cruise control from engaging. Lastly, verify that your wheel and tire combinations are appropriate for your vehicle, as incorrect sizes or uneven wear can impact the system's performance. By following this structured approach, you can effectively diagnose and potentially resolve cruise control issues before seeking professional assistance.

Troubleshooting Cruise Control Issues in a Mercedes-Benz CLS63 AMG S

When troubleshooting cruise control issues in your Mercedes-Benz CLS63 AMG S, it's essential to understand the common problems that may arise within the system. One frequent issue is a malfunctioning control module or sensor, which can prevent the cruise control from engaging or cause it to drop out intermittently. Additionally, the throttle may not be responding correctly, leading to erratic behavior. It's also crucial to check the fuses associated with the cruise control system, as blown fuses can disrupt functionality. If you notice that the cruise control indicator light is blinking, this could signal deeper electronic or mechanical issues. Another area to investigate is the speed sensors; if the cruise control won't set, these sensors may be faulty, especially if you lack access to advanced diagnostic tools. Furthermore, a malfunctioning brake light switch can also impede cruise control operation, even if the brake lights appear to be working. Always prioritize safety by remaining alert while driving, as sudden cruise control failures can lead to unexpected vehicle behavior. If these troubleshooting steps do not resolve the issue, consulting a professional service and maintenance team is advisable, as they possess the expertise to diagnose and repair complex problems effectively.

Why is the Cruise Control Not Working in a Mercedes-Benz CLS63 AMG S?

When the cruise control in your Mercedes-Benz CLS63 AMG S is not functioning, it is crucial to address the issue promptly to avoid potential safety risks and further damage to your vehicle. A malfunctioning cruise control system can be indicative of underlying problems, such as a defective ABS sensor, which not only affects cruise control but also compromises the functionality of the ABS and stability control systems. Additionally, a blown fuse or a faulty brake pedal switch can lead to the cruise control being disabled, impacting your driving experience and safety. Ignoring these symptoms may result in more severe issues, including costly repairs or even dangerous driving conditions. Therefore, it is essential to diagnose the root cause of the malfunction, whether it be related to the throttle control system, speed sensor, or even a broken vacuum line in older models. By taking immediate action, you can ensure your vehicle remains safe and reliable on the road.

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