2011 Mercedes-Benz C300 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2011 Mercedes-Benz C300 and How to Fix Them

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Reviewed by
Andrew Hajjar
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 2011 Mercedes-Benz C300 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 2011 Mercedes-Benz C300 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 initial diagnostic steps to take when the cruise control is not functioning on a 2011 Mercedes-Benz C300?

When faced with a malfunctioning cruise control system in your 2011 Mercedes-Benz C300, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse in the fuse box, as a blown fuse is a straightforward issue that can easily be resolved. Next, verify the functionality of the vehicle's speed sensors, since faulty sensors can prevent the cruise control from engaging. It's also crucial to examine the brake lights; a malfunctioning brake light switch can inadvertently disable the cruise control system. Additionally, inspect the wiring connections related to the cruise control for any signs of looseness or damage, as poor connections can disrupt functionality. Finally, consider using a diagnostic scanner to check for any error codes stored in the vehicle's computer, which can provide further insights into the underlying problem. By following these steps, you can effectively diagnose and address the cruise control issue, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2011 Mercedes-Benz C300?

When the cruise control in a 2011 Mercedes-Benz C300 ceases to function, it is essential to consider several common issues that may be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control system's operation; if this switch malfunctions, it can prevent the system from engaging, as it is designed to deactivate when the brake pedal is pressed. Additionally, problems 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 a malfunctioning throttle actuator, which can hinder the cruise control's performance by failing to respond correctly to speed adjustments. Furthermore, a defective cruise control module may also be responsible for the system's inability to engage or maintain the desired speed. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the cruise control's operation. By systematically checking these components, DIYers can effectively troubleshoot and resolve the issues plaguing the cruise control system in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2011 Mercedes-Benz C300?

When it comes to a non-functioning cruise control in a 2011 Mercedes-Benz C300, the urgency of addressing the issue cannot be overstated. While it may seem like a minor inconvenience, neglecting this problem can lead to more significant safety risks and potential damage to the vehicle's electronic systems. Cruise control is designed to enhance driving comfort and efficiency, particularly during long trips, and its failure may indicate underlying issues that could affect other critical functions of the car. For DIY enthusiasts, it’s essential to recognize that timely intervention not only ensures a safer driving experience but also helps prevent further complications that could escalate repair costs. By diagnosing and addressing the cruise control malfunction promptly, you can maintain the vehicle's overall performance and reliability, making it a worthwhile endeavor for any car owner.

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