2009 Mercedes-Benz CLS63 AMG Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2009 Mercedes-Benz CLS63 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 2009 Mercedes-Benz CLS63 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 2009 Mercedes-Benz CLS63 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.

What are the steps to diagnose the non-functioning cruise control in a 2009 Mercedes-Benz CLS63 AMG?

To effectively diagnose the non-functioning cruise control in your 2009 Mercedes-Benz CLS63 AMG, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse in the fuse box, as a blown fuse can often be the simplest explanation for the issue. Next, verify the functionality of the cruise control switch located on the steering wheel, ensuring it engages properly. Following this, examine the speed sensors, which are critical for cruise control operation; any malfunction here can disrupt the system. Additionally, inspect the wiring connections for any signs of damage or looseness that could impede functionality. Utilizing a diagnostic scanner to check for error codes can provide insights into any underlying electronic issues. If these preliminary checks do not yield results, test the cruise control module to confirm it is sending and receiving signals correctly. Should the problem persist after these steps, consulting a qualified mechanic or dealership is advisable for a thorough diagnosis and repair. This structured approach not only helps in identifying the root cause but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2009 Mercedes-Benz CLS63 AMG?

When the cruise control in your 2009 Mercedes-Benz CLS63 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 brake light switch, which can prevent the cruise control from engaging if it fails to signal when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system, as it relies on accurate speed readings to maintain control. Another potential problem is vacuum leaks within the cruise control system, which can interfere with its operation. A defective cruise control module may also be at fault, as it is essential for the system's functionality. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the cruise control's performance. By systematically checking these components, you can identify and resolve the underlying issues, restoring your vehicle's cruise control functionality.

How urgent is it to address the non-functioning cruise control in a 2009 Mercedes-Benz CLS63 AMG?

When it comes to the non-functioning cruise control in a 2009 Mercedes-Benz CLS63 AMG, the urgency of addressing this issue cannot be overlooked. While it may not seem like an immediate emergency, neglecting this problem can lead to more significant complications down the line. The cruise control system is designed to enhance driving comfort and efficiency, particularly during long journeys, and its failure could indicate deeper electronic or sensor-related issues that might affect other critical systems in the vehicle. By postponing repairs, you risk not only the convenience of cruise control but also the potential for safety hazards that could arise from malfunctioning vehicle systems. Therefore, it is advisable to have the cruise control diagnosed and repaired by a qualified mechanic as soon as possible to ensure the vehicle remains safe and performs optimally on the road. Taking prompt action can help prevent further damage and maintain the overall integrity of your Mercedes-Benz.

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