2017 Mercedes-Benz E400 Cruise Control Isn't Working

Fixing cruise control issues in the 2017 Mercedes-Benz E400

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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 2017 Mercedes-Benz E400 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 E400 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-functional cruise control in a 2017 Mercedes-Benz E400?

When troubleshooting the non-functional cruise control in your 2017 Mercedes-Benz E400, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's operation. Next, inspect the cruise control switch located on the steering wheel for any signs of damage or malfunction, as this component is vital for engagement. Ensure that the cruise control system is enabled in the vehicle settings, as sometimes it may be inadvertently turned off. Utilizing a diagnostic scanner can help you identify any error codes or warning lights that may indicate underlying issues. Additionally, verify the functionality of the vehicle's speed sensors, as accurate data from these sensors is essential for the cruise control to work correctly. Don't overlook the brake pedal switch; if it's stuck or malfunctioning, it can prevent the cruise control from engaging. Finally, inspect the wiring and connections associated with the cruise control system for any loose or damaged connections that could hinder performance. By following these steps, you can effectively diagnose and potentially resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz E400?

When troubleshooting the cruise control system in a 2017 Mercedes-Benz E400, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the system from engaging if it fails to detect when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the cruise control's ability to maintain speed, as it relies on accurate readings to function effectively. Another potential problem is a malfunctioning throttle actuator, which can hinder the system's capability to sustain a constant speed. Electrical issues, such as blown fuses or wiring faults, can also interfere with the cruise control operation. Lastly, software glitches within the vehicle's control module may cause unexpected behavior in the cruise control system. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control functionality in your vehicle.

How urgent is it to address the malfunctioning cruise control in my 2017 Mercedes-Benz E400?

Addressing a malfunctioning cruise control in your 2017 Mercedes-Benz E400 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When cruise control fails, it can disrupt your ability to maintain a steady speed, increasing the likelihood of accidents on the road. Moreover, neglecting this issue can lead to more severe problems within your vehicle, as the underlying causes may affect other systems, resulting in costly repairs down the line. By prioritizing the repair of your cruise control, you not only enhance your driving safety but also contribute to the longevity and performance of your vehicle, ensuring that it remains in optimal condition for years to come. Therefore, it is essential to act swiftly and address any cruise control malfunctions to safeguard both your safety and your investment.

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