2014 Mercedes-Benz E400 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2014 Mercedes-Benz E400

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Reviewed by
Aisha
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 2014 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 2014 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 2014 Mercedes-Benz E400?

When troubleshooting the non-functional cruise control in a 2014 Mercedes-Benz E400, it's essential to adopt a methodical diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive; malfunctioning buttons can prevent the system from engaging. It's also crucial to verify the operation of the vehicle's speed sensors, as faulty sensors can hinder the cruise control's ability to maintain speed. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into specific issues affecting the cruise control system. Additionally, examine the brake and clutch switches to confirm they are functioning correctly, as these components are designed to disengage the cruise control when the pedals are pressed. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion. By following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your E400, ensuring a smoother driving experience. If problems persist, seeking assistance from a professional mechanic may be necessary.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz E400?

When the cruise control in your 2014 Mercedes-Benz E400 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty brake light switch, which may fail to signal that the brake pedal is engaged, thereby preventing the cruise control from activating. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a steady speed, leading to malfunction. Another potential problem is a malfunctioning throttle actuator, which is crucial for regulating speed; if it fails, the cruise control may struggle to operate effectively. Electrical problems, such as blown fuses or wiring issues, can also interfere with the cruise control system, causing it to stop working altogether. Lastly, vacuum leaks in the engine can diminish the necessary vacuum pressure for the cruise control to function properly. By identifying these common issues, you can take the first steps toward troubleshooting and potentially resolving the problem yourself.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz E400?

When it comes to the non-functioning cruise control in a 2014 Mercedes-Benz E400, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety of the vehicle may not be compromised, neglecting this issue can lead to a less enjoyable driving experience and may mask underlying problems that could escalate over time. The convenience of cruise control is particularly valuable during long drives, as it alleviates the need for constant acceleration, reducing driver fatigue. If left unaddressed, the malfunction could indicate deeper electrical or mechanical issues that might require more extensive repairs down the line. Therefore, it is wise to prioritize diagnosing and fixing the cruise control system promptly, ideally with the assistance of a qualified mechanic or authorized service center, to ensure that your vehicle remains in optimal condition and to prevent any potential complications that could arise from prolonged neglect.

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2014 Mercedes-Benz E400 Cruise Control Issues & Repairs