Mercedes-Benz E250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz E250 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
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25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz E250 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 Mercedes-Benz E250 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz E250

When troubleshooting cruise control issues in your Mercedes-Benz E250, begin by checking the simplest components first. Start with the brake light switch, as a malfunction here can disable the cruise control system; if the ETS and ABS warning lights are illuminated, this could indicate a related issue. Next, inspect the control module and throttle sensor, as these are critical for the cruise control's operation. If you notice intermittent functionality, it may be due to electronic glitches or mechanical failures, particularly in non-vacuum systems. Additionally, examine the link rod connecting the cruise control actuator to the throttle; ensure it is secure and free from damage, as a loose connection can lead to malfunction. If warning messages appear on your instrument cluster, take them seriously, as they often point to underlying problems that need addressing. By systematically checking these components, you can effectively diagnose and resolve cruise control issues, ensuring a smoother driving experience.

What Are the Common Problems Causing Cruise Control Issues in a Mercedes-Benz E250?

When troubleshooting cruise control issues in a Mercedes-Benz E250, it's essential to recognize the common problems that may be affecting the system's performance. A faulty control module is often at the heart of these issues, as it can disrupt the entire functionality of the cruise control. Additionally, malfunctioning sensors can lead to incorrect readings, preventing the system from engaging as intended. The throttle is another critical component; any problems here can directly impact the cruise control's ability to maintain speed. Moreover, the electrical system software is crucial for the smooth operation of various features, including cruise control, and any software glitches can result in malfunctions. Lastly, a blown fuse, often caused by a short circuit, can completely disable the cruise control system. By understanding these potential issues, you can effectively diagnose and address cruise control problems, leading to a more reliable and enjoyable driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz E250?

When your Mercedes-Benz E250's cruise control fails, it’s crucial to address the issue promptly, as neglecting it can lead to safety risks and further vehicle damage. Common culprits include a malfunctioning cruise control module, sensor, or switch, which can prevent the system from engaging properly. Additionally, a defective brake pedal switch may inadvertently signal that the brakes are applied, disabling cruise control. Problems with the ABS wheel speed sensor can also disrupt the system, as it relies on accurate speed readings to function correctly. If the brake light switch is faulty or a fuse is blown, these issues can further complicate the situation. Moreover, an ESP error can automatically disable cruise control, often linked to problems with the brake light switch, wheel speed sensor, or other related components. Given the potential for these issues to affect your driving experience and safety, it’s advisable to diagnose and resolve any cruise control malfunctions as soon as they arise.

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