2012 Mercedes-Benz E550 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2012 Mercedes-Benz E550 and How to Fix Them

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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 2012 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 2012 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2012 Mercedes-Benz E550?

When troubleshooting the non-functioning cruise control in a 2012 Mercedes-Benz E550, it's essential 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 functionality. Next, inspect the cruise control switch located on the steering wheel; ensure it is operational and not stuck or damaged. It's also crucial to verify that the brake lights are functioning correctly, since a malfunctioning brake light switch can inadvertently disable the cruise control. Additionally, examine the vehicle's speed sensors to confirm they are working properly and relaying accurate information to the cruise control system. Finally, consider scanning the vehicle's onboard computer for any error codes that may provide insight into the underlying issue. By following these steps, you can effectively narrow down the potential causes of the cruise control malfunction and take appropriate action to resolve the problem.

What are the common problems that could cause the cruise control to stop working in a 2012 Mercedes-Benz E550?

When dealing with cruise control issues in a 2012 Mercedes-Benz E550, it's essential to recognize the common problems that may be at play. One frequent culprit is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, speed sensor issues can arise, as the cruise control system relies on accurate speed readings to function properly. Another potential problem is vacuum leaks, which can disrupt the system's ability to maintain a steady speed. A defective cruise control module may also be responsible for the malfunction, as it plays a critical role in the system's operation. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly impact the functionality of the cruise control. By understanding these common issues, DIYers can effectively troubleshoot and resolve cruise control problems in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2012 Mercedes-Benz E550?

When it comes to the non-functioning cruise control in a 2012 Mercedes-Benz E550, understanding the urgency of the situation is crucial for any DIY enthusiast. While the absence of this feature may not pose an immediate safety risk, it can significantly detract from the overall driving experience, especially during long trips where maintaining a consistent speed is beneficial. Ignoring this issue could lead to more complex problems down the line, as the underlying cause of the malfunction may worsen if left unaddressed. Therefore, it is wise to prioritize diagnosing the cruise control system, as timely intervention can prevent further complications and ensure that your vehicle remains enjoyable and convenient to drive. Engaging a qualified mechanic for a thorough inspection can help identify the root cause and facilitate necessary repairs, ultimately preserving the functionality of this valuable feature.

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2012 Mercedes-Benz E550 Cruise Control Issues & Repairs