2015 Mercedes-Benz B Electric Drive Cruise Control Isn't Working

Fixing Cruise Control Malfunctions in 2015 Mercedes-Benz B Electric Drive

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Reviewed by
Devin Cabugcal
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 2015 Mercedes-Benz B Electric Drive 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 B Electric Drive 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 steps to diagnose the cruise control issue in a 2015 Mercedes-Benz B Electric Drive?

To effectively diagnose a cruise control issue in a 2015 Mercedes-Benz B Electric Drive, begin with the simplest and most accessible checks. Start by examining the cruise control fuse; a blown fuse can easily disrupt the system's functionality. Next, inspect the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can lead to malfunctions. Utilizing a diagnostic scanner to check for error codes in the vehicle's onboard computer can provide valuable insights into specific problems affecting the cruise control system. Additionally, verify the functionality of the vehicle speed sensor, as a malfunctioning sensor can hinder the cruise control from maintaining speed. Finally, conduct a thorough inspection of the wiring and connections associated with the cruise control system, looking for any signs of damage or loose connections. By following this structured approach, you can systematically identify and address the underlying issues affecting your cruise control system.

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

When troubleshooting the cruise control system in a 2015 Mercedes-Benz B Electric Drive, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it may incorrectly signal the cruise control to deactivate when the brakes are applied. Another potential culprit is the throttle actuator, which regulates the engine's throttle opening; any issues here can disrupt the cruise control's function. Electrical problems, such as blown fuses or wiring faults, can also impede the system's operation, as can vacuum leaks that compromise the necessary vacuum pressure for maintaining speed. By identifying and addressing these issues, you can effectively restore the cruise control functionality in your vehicle.

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

Addressing the malfunctioning cruise control in your 2015 Mercedes-Benz B Electric Drive is of utmost urgency due to several critical factors. First and foremost, safety is a primary concern; a malfunctioning system can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which poses significant risks not only to you but also to other road users. Additionally, the performance of your vehicle may be compromised, affecting fuel efficiency and overall drivability, which can detract from your driving experience. Ignoring these symptoms can lead to further complications, potentially causing damage to other vehicle components and resulting in more costly repairs down the line. Therefore, it is highly advisable to seek a professional inspection to accurately diagnose the issue and implement necessary repairs. Prioritizing the resolution of this problem is essential for maintaining the safety and optimal performance of your vehicle on the road.

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2015 Mercedes-Benz B Electric Drive Cruise Control Issues