2023 Mercedes-Benz GLS450 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2023 Mercedes-Benz GLS450

Find Repair Location
Reviewed by
Devin Cabugcal
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 2023 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 2023 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.

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.

What steps should I take to diagnose the non-functioning cruise control in my 2023 Mercedes-Benz GLS450?

To effectively diagnose the non-functioning cruise control in your 2023 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 located in the fuse box, as a blown fuse is a common and easily rectifiable issue. Next, examine the cruise control buttons on your steering wheel for any signs of damage or sticking, as these can prevent the system from engaging. Following this, verify the functionality of the speed sensors, since faulty sensors can disrupt the cruise control operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, ensure that the brake and clutch switches are functioning correctly, as malfunctioning switches can disable the cruise control. Finally, inspect the wiring and connections associated with the cruise control system for any damage or corrosion, as these can also lead to operational failures. By methodically following these steps, you can identify the root cause of the cruise control malfunction and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to malfunction in a 2023 Mercedes-Benz GLS450?

When troubleshooting cruise control malfunctions in a 2023 Mercedes-Benz GLS450, it's essential to understand the common problems that may arise. A faulty speed sensor is often a primary culprit, as it can disrupt the system's ability to maintain a steady speed, leading to inconsistent performance. Additionally, issues with the brake light switch can prevent the cruise control from engaging or disengaging correctly, which can be frustrating for drivers. Another potential issue is a malfunctioning throttle actuator, which can cause erratic behavior in the cruise control system, making it difficult to control speed effectively. Furthermore, vacuum leaks in the engine can lead to fluctuations in engine power, adversely affecting cruise control functionality. Lastly, electrical problems, such as wiring issues or malfunctions, can disrupt communication between the cruise control module and other vehicle systems, resulting in further complications. By identifying and addressing these common problems, you can effectively troubleshoot and resolve cruise control issues in your GLS450, ensuring a smoother driving experience.

How urgent is it to address the malfunctioning cruise control in a 2023 Mercedes-Benz GLS450?

When it comes to a malfunctioning cruise control in your 2023 Mercedes-Benz GLS450, the urgency of addressing the issue cannot be overstated. A faulty cruise control system can lead to unexpected acceleration or deceleration, creating a significant safety hazard on the road. This unpredictability not only compromises your safety but also that of other drivers and passengers. Additionally, neglecting this problem can detract from the overall driving experience, making it less convenient and enjoyable to use this feature. Beyond immediate safety concerns, ignoring cruise control malfunctions may result in increased fuel consumption and could potentially lead to damage in other vehicle components, escalating repair costs. Therefore, it is crucial to address any cruise control issues promptly to avoid further complications and ensure a safe, smooth driving experience. Taking action now can save you from more extensive repairs and enhance your vehicle's performance in the long run.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.