2023 Mercedes-Benz GLC300 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2023 Mercedes-Benz GLC300 and How to Fix Them

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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 2023 Mercedes-Benz GLC300 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 GLC300 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 troubleshoot the non-functional cruise control in a 2023 Mercedes-Benz GLC300?

When troubleshooting the non-functional cruise control in your 2023 Mercedes-Benz GLC300, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the simplest explanation for the issue. Next, verify that the cruise control settings are correctly configured on your dashboard and steering wheel controls, ensuring that nothing is inadvertently preventing activation. If these initial checks do not resolve the problem, utilize a diagnostic scanner to look for any error codes in the vehicle's onboard computer system, which can provide insights into underlying issues. Additionally, inspect the cruise control buttons on the steering wheel for any signs of physical damage or malfunction that could hinder operation. Finally, conduct a test drive to see if the cruise control engages and to identify any functional discrepancies during use. By following this structured approach, you can effectively narrow down the potential causes of the cruise control malfunction and take appropriate action.

What are the common problems that could cause the cruise control to malfunction in a 2023 Mercedes-Benz GLC300?

When diagnosing cruise control malfunctions in a 2023 Mercedes-Benz GLC300, it's essential to consider several common problems that may be affecting the system's performance. A faulty speed sensor is often at the forefront, as it plays a crucial role in relaying the vehicle's speed to the cruise control system; if it fails, the system may struggle to maintain a consistent speed. Additionally, issues with the brake light switch can prevent the cruise control from engaging or disengaging correctly, leading to unexpected behavior. Another potential culprit is the throttle actuator, which, if malfunctioning, can cause erratic cruise control responses. Electrical problems, such as blown fuses or damaged wiring, can also disrupt the system's functionality, making it vital to inspect these components. Lastly, software glitches within the vehicle's control module can lead to cruise control issues, so ensuring that the software is up to date is a key step in troubleshooting. By systematically checking these areas, DIYers can effectively identify and resolve cruise control problems in their GLC300.

How urgent is it to address the malfunctioning cruise control in a 2023 Mercedes-Benz GLC300?

Addressing a malfunctioning cruise control in your 2023 Mercedes-Benz GLC300 is not just a matter of convenience; it is a critical safety concern that should be prioritized. When cruise control fails, it can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which significantly increases the risk of accidents on the road. Moreover, neglecting this issue can detract from your overall driving experience, making long trips less enjoyable and more stressful. Additionally, a malfunctioning system may cause your vehicle to consume more fuel than necessary, leading to higher operating costs and potentially causing strain on other components of your car. Therefore, it is essential to address any cruise control issues promptly to ensure both your safety and the optimal performance of your Mercedes-Benz GLC300.

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