Mercedes-Benz CLS55 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz CLS55 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 CLS55 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 CLS55 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz CLS55 AMG

When troubleshooting cruise control issues in your Mercedes-Benz CLS55 AMG, it's essential to adopt a methodical diagnostic approach. Start by checking the brake pedal switch, as a defective switch can prevent the cruise control from engaging. If the switch appears functional, inspect the ABS wheel speed sensor, since a malfunction here can trigger warning lights and disrupt cruise control operation. Next, examine the brake light switch and the associated lights; if they are not functioning correctly, the system may mistakenly think the brakes are applied, leading to deactivation of cruise control. Pay attention to the stalk position and indicator lights, as these can indicate the current mode of the cruise control system. Finally, if service indicator lights like ETS and ABS are illuminated, this could point to underlying issues that need addressing. By following this structured approach, you can effectively diagnose and resolve cruise control problems, ensuring a smoother driving experience.

What Are the Common Causes of Cruise Control Malfunction in a Mercedes-Benz CLS55 AMG?

When experiencing cruise control malfunctions in a Mercedes-Benz CLS55 AMG, it's crucial to understand the common problems that may be at play. One of the primary culprits is a failed control module, sensor, or switch, which can disrupt the entire cruise control system. Additionally, a defective brake pedal switch is often responsible for preventing the cruise control from engaging, as the system may incorrectly interpret that the brakes are applied. Another potential issue lies within the throttle actuation system, which can hinder the cruise control's functionality. Furthermore, a faulty ABS wheel speed sensor can not only affect cruise control but also trigger warning lights for ABS and ESP, indicating a broader electrical issue. The cruise control switch itself may also be defective, leading to operational failures. Lastly, electrical problems, such as a malfunctioning spiral cable in the steering wheel, can interrupt communication between the control switch and the cruise control system, preventing it from turning on. By diagnosing these common issues, DIYers can effectively troubleshoot and potentially resolve cruise control malfunctions in their Mercedes-Benz CLS55 AMG.

Why is the Cruise Control Not Working in a Mercedes-Benz CLS55 AMG?

When the cruise control in your Mercedes-Benz CLS55 AMG is not functioning, it’s crucial to understand the underlying issues that could be at play. Common culprits include a malfunctioning ABS sensor, which can disable not only the cruise control but also the ABS and stability control systems, posing a significant safety risk. Additionally, a defective brake pedal switch or a blown fuse can interrupt the cruise control's operation, making it essential to check these components first. Problems with the throttle control system may also hinder cruise control functionality, as this system is integral to maintaining speed. Lastly, a damaged speed sensor can prevent the cruise control from engaging, as it is responsible for confirming the vehicle's speed. Ignoring these symptoms can lead to more severe safety hazards and costly repairs, so it’s advisable to diagnose and address these issues promptly to ensure a safe and reliable driving experience.

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Mercedes-Benz CLS55 AMG Cruise Control Issues & Repairs