2019 Mercedes-Benz CLA250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2019 Mercedes-Benz CLA250 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
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 2019 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 2019 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 steps should I take to diagnose the cruise control issue in my 2019 Mercedes-Benz CLA250?

To effectively diagnose the cruise control issue in your 2019 Mercedes-Benz CLA250, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel for any signs of damage or wear that could hinder their operation. Utilizing an OBD-II scanner to check for error codes is a crucial step, as these codes can pinpoint specific problems within the system. Following this, verify the performance of the speed sensors, which are essential for the cruise control to function correctly. Additionally, inspect the wiring connections associated with the cruise control system for any loose or damaged wires that may be causing the issue. If these preliminary checks do not resolve the problem, testing the cruise control module is advisable to ensure it is communicating effectively. Should you still encounter difficulties, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is recommended for a thorough diagnosis and repair. By following this structured approach, you can efficiently identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2019 Mercedes-Benz CLA250?

When the cruise control in your 2019 Mercedes-Benz CLA250 stops functioning, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge the vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain speed. Another common issue is related to the brake light switch; if this switch is defective, it can cause the cruise control to disengage unexpectedly when the brake pedal is pressed, even if you haven't turned it off. Additionally, a malfunctioning throttle actuator can disrupt the communication between the cruise control and the engine, preventing the system from maintaining a steady speed. Electrical problems, such as blown fuses or wiring issues, can also hinder the cruise control's operation, as can software glitches within the vehicle's onboard computer. By identifying these potential problems, you can take the first steps toward troubleshooting and possibly resolving the cruise control malfunction in your vehicle.

How urgent is it to address the non-functioning cruise control in a 2019 Mercedes-Benz CLA250?

When it comes to a non-functioning cruise control in a 2019 Mercedes-Benz CLA250, the urgency of addressing the problem cannot be overstated. Cruise control is not just a luxury feature; it plays a crucial role in enhancing driving comfort and safety, especially during long journeys. If your cruise control is malfunctioning, it may signal deeper issues within the vehicle's systems that could compromise overall performance and safety. Ignoring this symptom could lead to more severe problems, potentially resulting in costly repairs or even dangerous driving situations. For DIY enthusiasts, it’s essential to recognize that while troubleshooting may seem straightforward, the underlying causes can vary significantly, and some may require professional intervention. Therefore, it is advisable to inspect and repair the cruise control system promptly to ensure your vehicle remains safe and reliable on the road. Taking action sooner rather than later can help prevent accidents and ensure that your driving experience remains enjoyable and efficient.

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