2022 Mercedes-Benz GLS450 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2022 Mercedes-Benz GLS450

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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 2022 Mercedes-Benz GLS450 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 2022 Mercedes-Benz GLS450 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.

What steps should I take to diagnose the cruise control issue in my 2022 Mercedes-Benz GLS450?

To effectively diagnose the cruise control issue in your 2022 Mercedes-Benz GLS450, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable problem that can disrupt functionality. 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 sensor's performance, since it is essential for providing accurate speed readings necessary for cruise control operation. Utilizing a diagnostic scanner to check for error codes can further assist in identifying specific issues within the system. Additionally, inspect the brake and clutch switches, as faulty components here can disable cruise control. Lastly, take a close look at the wiring and connections related to the cruise control system, as any loose or damaged wiring can hinder communication between components. If these steps do not resolve the issue, it may be time to consult a professional mechanic or an authorized Mercedes-Benz service center for a comprehensive diagnosis and repair. This methodical approach not only saves time but also enhances the likelihood of successfully identifying and addressing the problem.

What are the common problems that could cause the cruise control to stop working in a 2022 Mercedes-Benz GLS450?

When the cruise control in your 2022 Mercedes-Benz GLS450 ceases to function, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the primary culprits is a faulty speed sensor, which is crucial for the cruise control system to accurately gauge your vehicle's speed. If this sensor is malfunctioning, the system may fail to engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control, as this switch is designed to deactivate the system when the brakes are applied. Another potential issue is a malfunctioning throttle actuator, which can hinder the cruise control's ability to adjust the throttle position, thereby affecting its performance. Furthermore, a defective cruise control module can lead to a complete failure of the system, necessitating repair or replacement. Lastly, electrical problems such as wiring issues or blown fuses can also impede the cruise control's operation. By identifying and addressing these common issues, you can restore the functionality of your cruise control system and enhance your driving experience.

How urgent is it to address the malfunctioning cruise control in a 2022 Mercedes-Benz GLS450?

When it comes to a malfunctioning cruise control system in your 2022 Mercedes-Benz GLS450, the urgency to address the issue cannot be overstated. A faulty cruise control can compromise your vehicle's ability to maintain a steady speed, which is particularly concerning during long drives or on highways where consistent speed is crucial for safety and fuel efficiency. Ignoring this problem may not only lead to unexpected speed fluctuations that could result in accidents but could also exacerbate the issue, leading to more extensive and costly repairs down the line. For DIY enthusiasts, while it may be tempting to delay repairs, it is essential to recognize that timely intervention can prevent further damage to the vehicle's systems. Therefore, if you notice any signs of malfunction, it is advisable to inspect the cruise control system as soon as possible, and if necessary, consult a qualified technician to ensure your vehicle remains safe and reliable on the road.

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