2021 Mercedes-Benz GLE450 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2021 Mercedes-Benz GLE450

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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 2021 Mercedes-Benz GLE450 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 2021 Mercedes-Benz GLE450 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 diagnostic steps to take when the cruise control is not working on a 2021 Mercedes-Benz GLE450?

When faced with a non-functioning cruise control system in your 2021 Mercedes-Benz GLE450, start by checking the cruise control settings to 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 malfunction, as faulty buttons can hinder engagement. It's also essential to verify that the speed sensors are operational, as they provide critical data for the cruise control system. If these initial checks do not resolve the issue, consider using a diagnostic scanner to identify any error codes that may indicate specific problems. Additionally, inspect the fuse associated with the cruise control system, as a blown fuse can disrupt functionality. Lastly, examine the wiring connections for any damage or loose ends, and consult your owner's manual for further guidance tailored to your vehicle. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue on your GLE450.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz GLE450?

When the cruise control in your 2021 Mercedes-Benz GLE450 ceases to function, it can be frustrating, but understanding the common problems can help you diagnose the issue. One frequent culprit is a faulty speed sensor, which is essential for the cruise control system to accurately gauge your vehicle's speed. If this sensor malfunctions, the system may fail to engage or maintain the desired speed. Another common issue arises from the brake light switch; if this switch is defective, it may not properly signal the cruise control to disengage when the brake pedal is pressed, leading to operational failures. Additionally, problems with the throttle actuator can disrupt the system's ability to maintain a constant speed, as this component regulates the engine's throttle opening. Electrical issues, such as blown fuses or wiring problems, can also impede the cruise control's functionality, as can software glitches within the vehicle's onboard computer system. By systematically checking these components, you can effectively troubleshoot and potentially resolve the cruise control issues in your GLE450, restoring its functionality and enhancing your driving experience.

How urgent is it to address the malfunctioning cruise control in my 2021 Mercedes-Benz GLE450?

Addressing a malfunctioning cruise control in your 2021 Mercedes-Benz GLE450 is not just a matter of convenience; it is a critical safety concern that requires immediate attention. When cruise control fails, it can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents. Beyond safety, neglecting this issue can adversely affect your vehicle's overall performance, potentially leading to more extensive and costly repairs down the line. Additionally, if your vehicle is still under warranty, timely repairs may be covered, allowing you to avoid out-of-pocket expenses. Lastly, maintaining your vehicle's functionality, including the cruise control system, is essential for preserving its resale value. Therefore, it is crucial to prioritize the repair of your cruise control system to ensure your safety, protect your investment, and maintain the integrity of your vehicle.

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