2020 Mercedes-Benz CLA250 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2020 Mercedes-Benz CLA250 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2020 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 2020 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 non-functioning cruise control in my 2020 Mercedes-Benz CLA250?

To effectively diagnose the non-functioning cruise control in your 2020 Mercedes-Benz CLA250, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on the steering wheel for any signs of damage or sticking, as these can hinder the system's operation. Following this, verify the functionality of the speed sensor, since a malfunction here can disrupt the cruise control's ability to engage. 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 functioning correctly, as faulty switches can prevent activation. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as poor connections can lead to failure. 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 2020 Mercedes-Benz CLA250?

When the cruise control in your 2020 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 essential for the cruise control system to maintain the desired speed accurately. If the speed sensor is malfunctioning, it may not relay the correct information to the system, causing it to fail. Another common issue is a defective brake light switch; if this switch is not working properly, it can inadvertently disengage the cruise control when you press the brake pedal. Additionally, problems with the throttle actuator can disrupt the communication between the cruise control and the engine, leading to operational failures. It's also worth checking the fuses related to the cruise control system, as a blown fuse can prevent it from working altogether. Lastly, software glitches in the vehicle's computer system can interfere with cruise control functionality, so ensuring that your vehicle's software is up to date is crucial. By identifying these potential issues, you can take the first steps toward troubleshooting and possibly restoring your cruise control system.

How urgent is it to address the malfunctioning cruise control in my 2020 Mercedes-Benz CLA250?

When it comes to your 2020 Mercedes-Benz CLA250, addressing a malfunctioning cruise control system is not just a matter of convenience; it is a critical safety concern that requires immediate attention. A malfunction can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant risk while driving, particularly on highways where maintaining a steady speed is essential. The potential for loss of control over your vehicle's speed can increase the likelihood of accidents, making it imperative to resolve any issues as soon as they arise. Furthermore, neglecting this problem can adversely affect the overall performance and efficiency of your vehicle, leading to a decline in driving experience. Most importantly, ignoring the symptoms of a malfunctioning cruise control could result in more severe damage to your vehicle's systems, ultimately leading to costly repairs that could have been avoided. Therefore, it is crucial to prioritize the repair of your cruise control system to ensure your safety, maintain optimal vehicle performance, and protect your investment in your Mercedes-Benz.

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2020 Mercedes-Benz CLA250 Cruise Control Issues & Solutions