Mercedes-Benz GLA35 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz GLA35 AMG and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
30% chance it's the
Sensor
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25% chance it's the
Control Module
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz GLA35 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 Mercedes-Benz GLA35 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

A faulty cruise control module will simply result in deactivation of cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions, so the module will be disabled, and the cruise control system warning light will be displayed. This will be a different message depending on make and model, and a warning light or message may be displayed on the driver instrument cluster.

Troubleshooting Cruise Control Issues in a Mercedes-Benz GLA35 AMG

When troubleshooting cruise control issues in your Mercedes-Benz GLA35 AMG, it's crucial to adopt a methodical diagnostic approach. Begin by inspecting the cruise control module, as this is often the first point of failure; check for any visible malfunctions or error codes. Next, examine the sensor, ensuring it is functioning correctly and free from damage, as a faulty sensor can disrupt the entire system. After that, assess the throttle mechanism, as any issues here can directly impact cruise control performance. If these components appear to be in good condition, investigate the cruise control connector for dry solder joints, which can be a common yet overlooked problem. Lastly, pay attention to the instrument cluster for any warning messages that may indicate deeper issues. By following this structured approach, you can effectively identify and resolve cruise control problems, ensuring a smoother driving experience. If you encounter persistent issues, don’t hesitate to consult a professional mechanic for further assistance.

What Could Cause Cruise Control Issues in a Mercedes-Benz GLA35 AMG?

When troubleshooting cruise control issues in a Mercedes-Benz GLA35 AMG, it's essential to consider several common problems that could be affecting the system's functionality. One of the primary culprits is the control module, which can malfunction and disrupt the cruise control operation. Additionally, sensors and the throttle can also contribute to these issues, as they play a crucial role in the system's performance. Another frequent cause is a dead battery or a faulty ABS wheel speed sensor; if the ABS sensor fails, it may trigger warning lights for the Electronic Stability Program (ESP) and ABS, indicating a broader issue. It's also important to check the brake lights, as a burned-out bulb can prevent the cruise control from engaging. Lastly, since the cruise control system is electronically controlled, a blown fuse due to a short circuit can render it inoperative until replaced. By systematically examining these potential problems, you can effectively diagnose and address cruise control malfunctions in your GLA35 AMG.

Why is the Cruise Control Not Working in a Mercedes-Benz GLA35 AMG?

When the cruise control in your Mercedes-Benz GLA35 AMG is not functioning, it is crucial to address the issue promptly, as it may indicate underlying problems that could compromise your safety on the road. A malfunctioning ABS sensor can not only disable your cruise control but also affect essential safety features like ABS and stability control, increasing the risk of accidents. Additionally, a defective brake pedal switch or a blown fuse can lead to unexpected behavior in your vehicle, making it imperative to investigate these components. Older systems may suffer from issues such as a broken vacuum line or throttle control problems, which can further complicate the situation. Ignoring these symptoms could lead to more significant damage and costly repairs down the line. Therefore, if you experience cruise control issues, it is advisable to consult a qualified technician or a Mercedes-Benz specialist who can accurately diagnose and resolve the problem, ensuring your vehicle remains safe and reliable.

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