2020 Mercedes-Benz CLA35 AMG Cruise Control Isn't Working

Cruise Control Malfunctions in 2020 Mercedes-Benz CLA35 AMG and Fixes

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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 2020 Mercedes-Benz CLA35 AMG 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 CLA35 AMG 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 2020 Mercedes-Benz CLA35 AMG?

When diagnosing a cruise control issue in your 2020 Mercedes-Benz CLA35 AMG, it's essential to adopt a systematic approach that begins with the most straightforward checks. Start by examining the cruise control fuse; a blown fuse can easily disrupt the system's functionality, so replacing it may resolve the issue. Next, inspect the cruise control buttons on your steering wheel to ensure they are responsive and not stuck, as faulty buttons can prevent the system from engaging properly. If these initial checks do not yield results, utilize a diagnostic scanner to identify any error codes that may indicate specific malfunctions within the cruise control system. Additionally, verify the operation of the speed sensors, as they are critical for maintaining the desired speed; any faults here can lead to erratic behavior. Finally, take a close look at the wiring connections associated with the cruise control system, checking for signs of damage or corrosion that could disrupt the electrical signals. By following this methodical approach, you can effectively narrow down the potential causes of the cruise control issue and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz CLA35 AMG?

When the cruise control in a 2020 Mercedes-Benz CLA35 AMG ceases to function, several common problems may be at play. A faulty speed sensor is often the culprit, as it is essential for the cruise control system to accurately gauge the vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control's operation, since the system relies on signals from the brake system to function correctly. Another potential issue is a malfunctioning throttle actuator, which is responsible for controlling the engine's throttle opening; if it fails, the cruise control may struggle to maintain speed. Electrical problems, such as blown fuses or wiring issues, can also hinder the cruise control system, as can software glitches within the vehicle's control module. By understanding these common problems, DIY enthusiasts can better diagnose and address the issues affecting their cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz CLA35 AMG?

Addressing a malfunctioning cruise control system in your 2020 Mercedes-Benz CLA35 AMG is crucial for maintaining both safety and vehicle performance. When cruise control fails, it can compromise your ability to maintain a steady speed, increasing the risk of accidents on the road. Additionally, such malfunctions may signal deeper issues within the vehicle's electronic systems or sensors, which could affect other critical functions. Ignoring these symptoms not only diminishes your driving comfort and fuel efficiency but can also lead to more extensive and costly repairs down the line. Therefore, it is essential to diagnose and resolve cruise control issues promptly, ensuring your vehicle operates safely and efficiently. Taking action now can prevent further complications and enhance your overall driving experience.

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