Mercedes-Benz CL65 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz CL65 AMG and How to Fix Them

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Reviewed by
Bo Fader
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 CL65 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 CL65 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.

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 CL65 AMG

When troubleshooting cruise control issues in your Mercedes-Benz CL65 AMG, it's essential to adopt a methodical diagnostic approach. Start by checking the simplest potential problems, such as inspecting the fuse box for any blown fuses, as this is a common and easily fixable issue. Next, examine the brake lights and brake switch, ensuring they are functioning correctly, since a malfunction here can directly affect cruise control operation. If these components are in good condition, move on to the spiral cable in the steering wheel, as a faulty cable can disrupt communication between the control switch and the cruise control system. Additionally, inspect the vehicle's electrical connections for any signs of wear or damage, as these can also lead to malfunctions. If the cruise control still does not engage, consider engine-related issues, including any check engine lights that may indicate underlying problems. Lastly, verify that your wheel and tire combinations are appropriate, as discrepancies in tire size or wear can impact the cruise control's performance. By following this structured approach, you can effectively identify and resolve the issues affecting your cruise control system.

What Are the Common Causes of Cruise Control Malfunction in a Mercedes-Benz CL65 AMG?

When experiencing cruise control malfunctions in a Mercedes-Benz CL65 AMG, it's essential to understand the common problems that may arise. One of the primary culprits is a defective brake pedal switch, which can disrupt the cruise control's functionality. Additionally, electrical issues, such as a faulty spiral cable within the steering wheel, can hinder communication between the cruise control system and the vehicle's electronics. Another significant factor to consider is the ABS wheel speed sensor; if this sensor fails, it may trigger warning lights and prevent the cruise control from engaging. The cruise control switch itself should also be examined, as its malfunction can impede the ability to set and maintain speed. Furthermore, ensuring that the power supply is intact by checking for blown fuses is crucial for the system's operation. Lastly, environmental factors, including adverse weather conditions, can also affect cruise control performance. By systematically addressing these potential issues, DIY enthusiasts can effectively diagnose and resolve cruise control malfunctions, ensuring a smoother driving experience in their Mercedes-Benz CL65 AMG.

Why is the Cruise Control Not Working in a Mercedes-Benz CL65 AMG?

When the cruise control in your Mercedes-Benz CL65 AMG is not functioning, it is crucial to address the issue without delay. Ignoring symptoms such as erratic speed control or the system failing to engage can pose significant safety risks, especially during long drives where maintaining a consistent speed is essential. Common culprits include a faulty ABS sensor, which can not only disable cruise control but also affect other critical systems like ABS and stability control. Additionally, a defective brake pedal switch or a blown fuse can disrupt the cruise control functionality, making it imperative to check these components first. Furthermore, issues with the throttle control system or a damaged speed sensor can lead to unpredictable behavior, potentially resulting in dangerous driving conditions. Lastly, ensure that the correct cruise control mode is selected, as using the Variable Speedtronic mode instead can prevent the system from operating as intended. By promptly diagnosing and addressing these issues, you can ensure a safer driving experience and prevent further damage to your vehicle.

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