2017 Mercedes-Benz E550 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2017 Mercedes-Benz E550

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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 E550 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 E550 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2017 Mercedes-Benz E550?

When troubleshooting the non-functioning cruise control in a 2017 Mercedes-Benz E550, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by inspecting the cruise control fuse in the vehicle's fuse box, as a blown fuse is a common and easily rectifiable problem. Next, examine the cruise control buttons on the steering wheel to ensure they are operational and not obstructed or damaged, as this can hinder system engagement. Keep an eye out for any warning lights or error messages on the dashboard, as these can provide valuable clues about the underlying issue. Additionally, assess the vehicle speed sensor, which is essential for the cruise control's functionality, and utilize a diagnostic scanner to retrieve any stored diagnostic trouble codes (DTCs) that may indicate specific malfunctions. It's also vital to check the brake and clutch switches, as these components are designed to deactivate the cruise control when the pedals are pressed. Lastly, inspect the cruise control module for any signs of damage or malfunction, as problems with this component can lead to a complete failure of the system. By systematically following these steps, you can effectively identify and 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 E550?

When troubleshooting the cruise control system in a 2017 Mercedes-Benz E550, it's important to be aware of several common problems that could be at play. One of the primary culprits 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, issues with the brake light switch can lead to unexpected disengagement of the cruise control when the brake pedal is pressed, even if the driver hasn't manually turned it off. Another potential issue is a malfunctioning throttle actuator, which disrupts communication between the cruise control system and the engine, causing operational failures. Furthermore, a defective cruise control module may prevent the system from receiving the necessary signals to function properly. Lastly, various electrical problems, such as blown fuses or wiring issues, can also contribute to cruise control malfunctions. By understanding these common problems, DIY enthusiasts can better diagnose the issue and determine whether they can resolve it themselves or if professional assistance is needed.

How urgent is it to address the non-functioning cruise control in a 2017 Mercedes-Benz E550?

When it comes to the non-functioning cruise control in a 2017 Mercedes-Benz E550, understanding the urgency of the situation is crucial for any DIY enthusiast. While this issue may not pose an immediate safety risk like malfunctioning brakes or engine problems, it can still significantly impact your driving experience. A malfunctioning cruise control system can lead to increased driver fatigue during long trips, as it removes the convenience of maintaining a steady speed. Additionally, neglecting this problem could result in further complications, such as more extensive repairs or even safety risks if the system fails to engage when needed. Therefore, it is advisable to address the issue promptly, ensuring that your vehicle remains comfortable and efficient for all your journeys. Taking the time to inspect and potentially repair the cruise control system not only enhances your driving experience but also prevents the escalation of minor issues into major concerns.

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