2016 Mercedes-Benz C350e Cruise Control Isn't Working

Diagnosing Cruise Control Issues in Your 2016 Mercedes-Benz C350e and How to Restore Functionality

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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 2016 Mercedes-Benz C350e 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 2016 Mercedes-Benz C350e 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 troubleshoot the non-functioning cruise control in a 2016 Mercedes-Benz C350e?

When troubleshooting the non-functioning cruise control in a 2016 Mercedes-Benz C350e, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as malfunctioning buttons can prevent activation. Following this, verify the speed sensors, which play a crucial role in maintaining the set speed; faulty sensors can lead to erratic behavior or complete failure of the cruise control. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Additionally, ensure that the brake and clutch switches are functioning correctly, as these components are designed to disengage the cruise control when the pedals are pressed. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for any signs of damage or corrosion that could hinder performance. By following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2016 Mercedes-Benz C350e?

When the cruise control in a 2016 Mercedes-Benz C350e ceases to function, several common problems may be at play. One of the primary culprits is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, issues with the brake light switch can pose a significant problem; since the cruise control system is designed to disengage when the brake pedal is pressed, a malfunctioning switch may fail to send the necessary signal to the cruise control module. Another potential issue is a malfunctioning throttle actuator, which is responsible for controlling the engine's throttle opening and can hinder the system's ability to maintain speed. Furthermore, a defective cruise control module itself can lead to complete system failure, as it plays a crucial role in regulating speed when activated. Lastly, electrical problems such as wiring issues or blown fuses can also contribute to the cruise control's malfunction. By understanding these common issues, DIY enthusiasts can better diagnose the problem and take appropriate steps to restore functionality to their vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in my 2016 Mercedes-Benz C350e?

Addressing a malfunctioning cruise control system in your 2016 Mercedes-Benz C350e is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can compromise your ability to maintain a steady speed, increasing the risk of accidents on the road. Moreover, neglecting this issue can lead to more severe problems within the vehicle's systems, resulting in costly repairs down the line. By prioritizing the repair of your cruise control, you not only enhance your safety but also protect the overall performance and longevity of your vehicle, which is essential for maintaining its resale value. Therefore, it is crucial to act swiftly to resolve any cruise control issues to ensure a safe and reliable driving experience.

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