2014 Mercedes-Benz CL550 Cruise Control Isn't Working

Fixing cruise control issues in the 2014 Mercedes-Benz CL550

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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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2014 Mercedes-Benz CL550 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 2014 Mercedes-Benz CL550 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.

What are the steps to diagnose the cruise control issue in a 2014 Mercedes-Benz CL550?

To effectively diagnose a cruise control issue in a 2014 Mercedes-Benz CL550, it's essential to adopt a systematic diagnostic approach that prioritizes simpler checks before delving into more complex solutions. Begin by inspecting the cruise control fuse, as a blown fuse is a straightforward fix that can often resolve the problem. Next, examine the cruise control buttons on the steering wheel to ensure they are functioning correctly, as faulty buttons can disrupt the system's operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues, allowing you to target specific problems. Additionally, verify the functionality of the speed sensors, which are critical for the cruise control system's performance, and inspect the wiring connections for any signs of damage or looseness that could impede functionality. Finally, if the previous steps do not reveal the issue, test the cruise control module itself, as a malfunctioning module may be the root cause of the problem. By following this structured approach, you can efficiently identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz CL550?

When the cruise control in a 2014 Mercedes-Benz CL550 ceases to function, several common problems may be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the system's operation as it disengages cruise control when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to erratic behavior or complete failure. Another potential issue is vacuum leaks within the engine, which can interfere with the cruise control's operation, causing it to disengage unexpectedly. Furthermore, a defective cruise control module may also be responsible for the malfunction, as it is the central component that controls the system. Lastly, electrical problems, such as blown fuses or damaged wiring, can significantly impact the cruise control's functionality. By understanding these common issues, DIYers can effectively troubleshoot and resolve cruise control problems in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz CL550?

When it comes to the non-functioning cruise control in a 2014 Mercedes-Benz CL550, understanding the urgency of the situation is crucial for both safety and vehicle performance. While it may seem like a minor inconvenience, especially during short trips, neglecting this issue can lead to more significant problems down the line. Cruise control is designed to enhance your driving experience by maintaining a steady speed, which is particularly beneficial on long journeys where driver fatigue can become a concern. If your cruise control is malfunctioning, it may be indicative of underlying issues with the vehicle's components or sensors, which could compromise overall performance and safety. Moreover, delaying repairs could escalate the problem, potentially resulting in safety hazards, especially on highways where maintaining speed is essential. For those inclined to tackle the issue themselves, it’s advisable to first conduct a thorough inspection of the cruise control system, checking for any visible signs of wear or malfunction. However, if the problem persists, consulting a professional mechanic is recommended to ensure a proper diagnosis and repair. Addressing the cruise control issue promptly not only enhances your driving comfort but also safeguards your vehicle's integrity and your safety on the road.

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