2017 Mercedes-Benz GLA45 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2017 Mercedes-Benz GLA45 AMG

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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 2017 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 2017 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 2017 Mercedes-Benz GLA45 AMG?

To effectively diagnose the non-functioning cruise control in your 2017 Mercedes-Benz GLA45 AMG, 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 to ensure they are operational, as malfunctioning buttons can prevent the system from engaging. Following this, verify the speed sensors, as faulty sensors can disrupt the cruise control functionality. It’s also essential to check the brake pedal switch, since a defective switch can disable the cruise control system entirely. If these initial checks do not reveal the problem, utilize a diagnostic scanner to identify any error codes that may indicate specific issues within the cruise control system. Should these steps fail to resolve the issue, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable for a comprehensive diagnosis and repair. This methodical approach not only helps in identifying the problem efficiently but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2017 Mercedes-Benz GLA45 AMG?

When dealing with cruise control issues in a 2017 Mercedes-Benz GLA45 AMG, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty speed sensor, which can disrupt the system's ability to maintain the desired speed. Additionally, a malfunctioning brake light switch can lead to unexpected disengagement of the cruise control, even when the brakes are not applied. Another area to check is the throttle actuator, as any issues here can hinder communication between the engine and the cruise control system. It's also wise to inspect for vacuum leaks, as these can significantly impact the system's performance. Lastly, electrical problems, including blown fuses or wiring issues, can prevent the cruise control from functioning correctly. By systematically examining these components, DIYers can effectively troubleshoot and potentially fix the cruise control system in their vehicle.

How urgent is it to address the malfunctioning cruise control in a 2017 Mercedes-Benz GLA45 AMG?

When it comes to a malfunctioning cruise control system in a 2017 Mercedes-Benz GLA45 AMG, the urgency of addressing the issue cannot be overstated. A faulty cruise control can compromise your ability to maintain a steady speed, which not only poses a safety risk but also increases the likelihood of accidents on the road. Moreover, such malfunctions may signal deeper electronic or sensor-related problems that could affect other critical vehicle functions, leading to more severe issues if left unattended. Ignoring these symptoms can also result in decreased fuel efficiency and overall performance, potentially causing long-term damage to your vehicle. Therefore, it is crucial to prioritize the resolution of cruise control problems promptly, as this proactive approach can prevent further complications and save you from more costly repairs in the future.

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