2017 Mercedes-Benz CLA250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2017 Mercedes-Benz CLA250 and How to Fix Them

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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 2017 Mercedes-Benz CLA250 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 2017 Mercedes-Benz CLA250 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 2017 Mercedes-Benz CLA250?

When troubleshooting the non-functioning cruise control in your 2017 Mercedes-Benz CLA250, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can disrupt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive; sometimes, dirt or wear can hinder their functionality. Following this, verify the speed sensors, as they play a crucial role in maintaining the set speed; faulty sensors can lead to erratic behavior or complete failure of the cruise control. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues that may not be immediately visible. Additionally, examine the brake and clutch switches, as these components must function correctly for the cruise control to engage. Lastly, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as these can lead to connectivity problems. By methodically following these steps, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle. If the problem persists after these checks, seeking professional assistance may be necessary to ensure a thorough resolution.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz CLA250?

When troubleshooting cruise control issues in a 2017 Mercedes-Benz CLA250, it's essential to consider several common problems that may be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to deactivate when the brake pedal is pressed. Additionally, issues with the speed sensor can disrupt the cruise control's functionality, as it relies on accurate speed readings to maintain the desired pace. A blown fuse in the cruise control circuit can also lead to a complete system failure, making it crucial to check the fuses if the cruise control is unresponsive. Furthermore, a malfunctioning throttle actuator can hinder the system's ability to sustain a consistent speed, while a defective cruise control module may result in the system not responding to user commands. By understanding these potential issues, DIYers can effectively diagnose and address the problems affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in my 2017 Mercedes-Benz CLA250?

When your 2017 Mercedes-Benz CLA250's cruise control stops working, it’s crucial to recognize the urgency of the situation. A malfunctioning cruise control not only diminishes the convenience of maintaining a steady speed, which is particularly beneficial during long drives, but it may also signal deeper issues within your vehicle's electronic systems or engine control unit. Ignoring this problem could lead to more significant complications, potentially affecting your vehicle's overall performance and safety. For DIY enthusiasts, it’s essential to understand that while troubleshooting minor issues may be manageable, any signs of malfunction should prompt immediate investigation. This proactive approach not only ensures your safety on the road but also helps prevent further damage to your vehicle, making it imperative to address cruise control issues without delay.

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