2017 Mercedes-Benz C350e Cruise Control Isn't Working

Fixing Cruise Control Issues in 2017 Mercedes-Benz C350e

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Reviewed by
Devin Cabugcal
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 2017 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 2017 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 steps should I take to diagnose the cruise control issue in my 2017 Mercedes-Benz C350e?

To effectively diagnose the cruise control issue in your 2017 Mercedes-Benz C350e, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, since faulty buttons can lead to malfunctions. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific issues within the cruise control system. Following this, assess the speed sensors, as they are essential for the system's performance. Additionally, inspect the wiring connections for any signs of damage or looseness, as faulty wiring can significantly impact the cruise control's operation. Finally, if all else checks out, test the cruise control module itself, as a malfunctioning module could be the root cause of the problem. By following this structured diagnostic approach, you can efficiently identify and address the underlying issue affecting your vehicle's cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz C350e?

When troubleshooting the cruise control system in a 2017 Mercedes-Benz C350e, it's essential to understand the common problems that may lead to its failure. One prevalent issue 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, the brake light switch plays a crucial role; if it malfunctions, it may not signal the cruise control system to disengage when the brake pedal is pressed, leading to operational issues. Another potential culprit is the throttle actuator, which controls the engine's throttle opening; any malfunction here can hinder the cruise control's ability to sustain a constant speed. Electrical problems, such as blown fuses or wiring issues, can also impede the system's functionality, as can software glitches within the vehicle's control module. By identifying and addressing these common problems, you can effectively diagnose and repair the cruise control system, restoring its functionality and enhancing your driving experience.

How urgent is it to address the malfunctioning cruise control in my 2017 Mercedes-Benz C350e?

Addressing the malfunctioning cruise control in your 2017 Mercedes-Benz C350e is of utmost importance due to the immediate safety risks it poses. A malfunctioning system can compromise your ability to maintain a steady speed, increasing the likelihood of accidents or collisions on the road. Moreover, neglecting this issue can lead to more severe damage to your 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 ensure that your vehicle operates smoothly and efficiently, preventing any disruptions to your driving experience. Therefore, it is crucial to act promptly to mitigate these risks and maintain the reliability of your vehicle.

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