2017 Mercedes-Benz E300 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Mercedes-Benz E300 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2017 Mercedes-Benz E300 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 E300 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 2017 Mercedes-Benz E300?

When faced with a non-functioning cruise control in your 2017 Mercedes-Benz E300, start by checking the simplest components before delving into more complex diagnostics. Begin with the cruise control fuse; a blown or damaged fuse can easily disrupt the system's functionality. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational. If these components are functioning correctly, turn your attention to the vehicle speed sensor, as it is vital for the cruise control to engage properly. Additionally, examine the brake pedal switch, which should not be stuck or malfunctioning, since the cruise control system is designed to disengage when the brakes are applied. Finally, consider scanning the vehicle's onboard computer for any error codes that may provide insight into underlying issues. By systematically addressing these areas, you can effectively troubleshoot and potentially resolve the cruise control problem on your own.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz E300?

When dealing with a malfunctioning cruise control system in a 2017 Mercedes-Benz E300, it's essential to understand the common problems that may be at play. One frequent issue is a faulty speed sensor, which can hinder 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 can be a culprit; if it malfunctions, it may incorrectly signal the cruise control to deactivate when the brakes are applied. Another potential problem lies with the throttle actuator, which is responsible for adjusting the throttle position; if it fails, the cruise control may struggle to function properly. Furthermore, a defective cruise control module can lead to a complete lack of response from the system, rendering it inoperable. Lastly, electrical issues such as wiring faults or blown fuses can disrupt the entire cruise control system. If you experience any of these issues, it is advisable to consult a qualified mechanic for a thorough inspection and diagnosis to ensure your cruise control system is restored to working order.

How urgent is it to address the non-functioning cruise control in a 2017 Mercedes-Benz E300?

When it comes to the non-functioning cruise control in your 2017 Mercedes-Benz E300, understanding the urgency of the situation is crucial for both safety and vehicle performance. While it may not seem like an immediate emergency, neglecting this issue can lead to more significant problems down the line. A malfunctioning cruise control system can indicate underlying issues within your vehicle's electronic systems, which could potentially affect other critical functions. For DIY enthusiasts, it’s essential to recognize that addressing this problem promptly not only enhances your driving comfort during long trips but also prevents further complications that could arise from ignoring the symptoms. By prioritizing the inspection and repair of your cruise control system, you can ensure that your vehicle remains safe and efficient, ultimately preserving its overall functionality and your driving experience.

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