2019 Mercedes-Benz GLA45 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2019 Mercedes-Benz GLA45 AMG

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Reviewed by
Aisha
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 2019 Mercedes-Benz GLA45 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 2019 Mercedes-Benz GLA45 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 steps should I take to diagnose the non-functioning cruise control in my 2019 Mercedes-Benz GLA45 AMG?

When diagnosing the non-functioning cruise control in your 2019 Mercedes-Benz GLA45 AMG, it's crucial to follow a methodical diagnostic approach that prioritizes simpler checks before delving into more complex issues. Begin by examining the cruise control fuse, as a blown fuse is a common and easily rectifiable problem that can halt the system's operation. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive, since any malfunction here can directly impact functionality. Utilizing a diagnostic scanner to retrieve error codes from the vehicle's computer can provide valuable insights into potential malfunctions. Additionally, check the speed sensors, which are vital for the cruise control system's engagement; faulty sensors can prevent the system from activating. It's also essential to verify that the brake and clutch switches are functioning correctly, as these safety features can disable cruise control if they detect an issue. Lastly, assess the cruise control module to ensure it is properly sending and receiving signals. If these steps do not yield results, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is recommended for a thorough evaluation and repair. By systematically addressing these areas, 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 2019 Mercedes-Benz GLA45 AMG?

When troubleshooting the cruise control system in a 2019 Mercedes-Benz GLA45 AMG, it's essential to consider several common problems that could be affecting its functionality. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control to engage; if this switch malfunctions, the system may not activate as intended. Additionally, issues with the speed sensor can lead to incorrect speed readings, causing the cruise control to disengage unexpectedly or fail to maintain a set speed. Another potential issue is a malfunctioning throttle actuator, which can disrupt communication between the cruise control system and the engine, resulting in operational failures. Furthermore, a defective cruise control module itself can prevent the system from functioning correctly, leading to difficulties in engaging or maintaining speed. Lastly, electrical problems such as wiring issues or blown fuses can also impact the cruise control's performance. By systematically checking these components, you can effectively diagnose and potentially resolve the issues affecting your vehicle's cruise control system.

How urgent is it to address the malfunctioning cruise control in a 2019 Mercedes-Benz GLA45 AMG?

When it comes to a malfunctioning cruise control in your 2019 Mercedes-Benz GLA45 AMG, the urgency to address the issue cannot be overstated. A faulty cruise control system can compromise your ability to maintain a steady speed, which is particularly dangerous during long drives or on highways where consistent speed is crucial for safety. Moreover, such malfunctions may signal deeper electronic system or sensor issues that could affect the overall performance and drivability of your vehicle. Ignoring these symptoms not only risks your safety but can also lead to increased fuel consumption and potential damage to other vehicle components, resulting in more extensive and costly repairs down the line. Therefore, if you notice any irregularities with your cruise control, it is advisable to diagnose and resolve the issue promptly, ensuring both your safety and the longevity of your vehicle.

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