2017 Mercedes-Benz E43 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Mercedes-Benz E43 AMG and How to Fix Them

Find Repair Location
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 E43 AMG 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 E43 AMG 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 E43 AMG?

When faced with a non-functional cruise control in your 2017 Mercedes-Benz E43 AMG, start by checking the cruise control fuse, as a blown or damaged fuse can often be the simplest fix. Next, inspect the cruise control switch to ensure it is operating correctly; a malfunctioning switch can prevent the system from engaging. It's also crucial to verify the brake pedal switch, since a faulty switch can inadvertently signal that the brakes are applied, disabling the cruise control. Additionally, examine the vehicle speed sensor, which is vital for the cruise control's operation, as it monitors the car's speed. Finally, scanning the vehicle's onboard computer for error codes can provide insights into any underlying issues affecting the cruise control system. By following these steps in order, you can effectively diagnose and potentially resolve the cruise control problem without needing professional assistance.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz E43 AMG?

When the cruise control in your 2017 Mercedes-Benz E43 AMG ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the system to accurately gauge your vehicle's speed. If this sensor malfunctions, the cruise control may fail to engage or maintain the desired speed. Another frequent issue arises from the brake light switch; if this switch is defective, it may not signal the cruise control system correctly, causing it to disengage unexpectedly. Additionally, a malfunctioning throttle actuator can hinder the system's ability to maintain a constant speed, as it directly controls the engine's throttle opening. It's also essential to consider the cruise control module itself; if this component is defective, it can disrupt communication between various system parts, leading to operational failures. Lastly, electrical problems such as wiring issues or blown fuses can significantly impact the cruise control's functionality. By identifying and addressing these common issues, you can restore your cruise control system and enhance your driving experience.

How urgent is it to address the malfunctioning cruise control in a 2017 Mercedes-Benz E43 AMG?

Addressing a malfunctioning cruise control in a 2017 Mercedes-Benz E43 AMG is crucial for several reasons. First and foremost, a faulty cruise control system can compromise your ability to maintain a steady speed, which not only affects your comfort during long drives but also poses significant safety risks. Inconsistent speed can lead to dangerous situations, especially in heavy traffic or on highways. Additionally, issues with the cruise control may signal deeper electronic or sensor problems within the vehicle, which could affect other critical systems. Ignoring these symptoms can lead to more extensive damage and costly repairs down the line. Furthermore, a malfunctioning cruise control can decrease fuel efficiency, detracting from the overall driving experience that this luxury vehicle is designed to provide. Therefore, it is essential to diagnose and address any cruise control issues promptly, ensuring both your safety and the optimal performance of your Mercedes-Benz E43 AMG. If you're considering a DIY approach, be aware of the potential complexities involved and the importance of thorough troubleshooting to avoid exacerbating the problem.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.