2020 Mercedes-Benz CLA45 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2020 Mercedes-Benz CLA45 AMG

Find Repair Location
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 CLA45 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 CLA45 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 non-functioning cruise control in a 2020 Mercedes-Benz CLA45 AMG?

When diagnosing the non-functioning cruise control in your 2020 Mercedes-Benz CLA45 AMG, start by ensuring that the cruise control settings are properly configured. Confirm that the system is activated and set to your desired speed. Next, inspect the cruise control buttons on the steering wheel for any signs of damage or debris that could hinder their operation. It's also essential to verify the functionality of the speed sensors, as they are critical for cruise control performance; ensure they are unobstructed and working correctly. Utilizing a diagnostic scanner can help you identify any error codes related to the cruise control system, providing insight into specific issues. Additionally, check the fuse box for any blown fuses associated with the cruise control system and replace them if necessary. Don’t overlook the wiring connections; examine them for any loose, damaged, or corroded areas to ensure a secure connection. Finally, if all else checks out, testing the cruise control module can help determine if it is functioning as intended. By following these steps, you can effectively troubleshoot and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2020 Mercedes-Benz CLA45 AMG?

When troubleshooting cruise control issues in a 2020 Mercedes-Benz CLA45 AMG, it's essential to consider several common problems that could be at play. A faulty speed sensor is often a primary culprit, as it plays a crucial role in relaying the vehicle's speed to the cruise control system. If this sensor is malfunctioning, the system may struggle to maintain the desired speed. Additionally, the brake light switch can also cause disruptions; if this switch is defective, it may incorrectly signal the system to disengage when the brakes are not applied. Another potential issue lies with the throttle actuator, which is responsible for adjusting the throttle position. If it fails, the cruise control may not respond correctly to speed adjustments. Electrical problems, such as blown fuses or damaged wiring, can further complicate matters, leading to intermittent or complete failure of the cruise control system. Lastly, a malfunctioning cruise control module can prevent the system from operating as intended. By systematically checking these components, DIY enthusiasts can effectively diagnose and potentially resolve cruise control malfunctions in their vehicle.

How urgent is it to address the malfunctioning cruise control in a 2020 Mercedes-Benz CLA45 AMG?

When it comes to a malfunctioning cruise control system in your 2020 Mercedes-Benz CLA45 AMG, the urgency to address the issue cannot be overstated. A faulty cruise control can significantly compromise your driving experience, making it inconvenient and potentially dangerous. The primary concern is safety; if the cruise control fails to disengage or behaves erratically, it could lead to loss of vehicle control, increasing the risk of accidents. Additionally, neglecting this issue may result in further damage to the vehicle's electronic systems, leading to more extensive and costly repairs down the line. Therefore, it is crucial to act swiftly and consult a qualified mechanic or authorized service center to diagnose and rectify the problem. By prioritizing this repair, you not only enhance your driving safety but also protect your investment in the vehicle, ensuring it remains in optimal condition for years to come.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2020 Mercedes-Benz CLA45 AMG Cruise Control Issues & Fixes