2015 Mercedes-Benz E250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2015 Mercedes-Benz E250 and How to Fix Them

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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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2015 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 2015 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.

What steps should I take to diagnose the non-functioning cruise control in my 2015 Mercedes-Benz E250?

To effectively diagnose the non-functioning cruise control in your 2015 Mercedes-Benz E250, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue that can halt the system's operation. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. Following this, verify the functionality of the speed sensors, since faulty sensors can disrupt the cruise control's ability to maintain speed. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are operational, as malfunctioning switches can inhibit cruise control activation. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as these can lead to failures. By following this structured diagnostic approach, you can efficiently identify and address the root cause of your cruise control issues.

What are the common problems that could cause the cruise control to stop working in a 2015 Mercedes-Benz E250?

When the cruise control in your 2015 Mercedes-Benz E250 stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue effectively. One of the primary culprits is a faulty brake light switch, which may fail to signal when the brake pedal is pressed, thereby preventing the cruise control from engaging. Additionally, issues with the speed sensor can lead to incorrect speed readings, causing the system to malfunction or disengage unexpectedly. Another potential problem is a malfunctioning throttle actuator, which can disrupt the vehicle's ability to maintain a steady speed. Electrical problems, such as blown fuses or damaged wiring, can also interfere with cruise control functionality. Lastly, software glitches within the vehicle's control module may require diagnostic testing and reprogramming to resolve. By identifying these common issues, you can take the first steps toward restoring your cruise control system, whether through DIY repairs or by consulting a professional mechanic.

How urgent is it to address the malfunctioning cruise control in my 2015 Mercedes-Benz E250?

When it comes to the malfunctioning cruise control in your 2015 Mercedes-Benz E250, the urgency to address the issue cannot be overstated. A properly functioning cruise control system is essential for maintaining a steady speed, which not only enhances driving comfort but also significantly reduces driver fatigue during long journeys. However, if this system is compromised, it can lead to erratic speed changes or an inability to maintain your desired speed, creating hazardous conditions on the road. Such malfunctions can be particularly dangerous on highways or in heavy traffic, where sudden speed fluctuations can increase the risk of accidents. Moreover, neglecting these symptoms may result in further damage to the vehicle, potentially leading to more costly repairs down the line. Therefore, it is crucial to prioritize the inspection and repair of your cruise control system by a qualified mechanic to ensure both your safety and the optimal performance of your vehicle. Taking prompt action not only protects you but also contributes to the safety of everyone on the road.

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2015 Mercedes-Benz E250 Cruise Control Issues & Repairs