2022 Mercedes-Benz EQS 450+ Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2022 Mercedes-Benz EQS 450+ and How to Fix Them

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Reviewed by
Andrew Hajjar
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 EQS 450+ 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 EQS 450+ 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 EQS 450+?

To effectively diagnose the cruise control issue in your 2022 Mercedes-Benz EQS 450+, start by checking the cruise control settings to ensure they are properly configured. This includes verifying the speed settings and activation methods. Next, inspect the cruise control buttons on the steering wheel for any signs of malfunction, as faulty buttons can hinder functionality. Utilizing a diagnostic scanner to scan for error codes is crucial, as these codes can pinpoint specific problems within the system. Additionally, examine the cruise control fuse to confirm it is intact, since a blown fuse can disrupt operation. It's also important to check the sensors that monitor speed and distance; ensure they are clean and unobstructed, as dirty sensors can lead to performance issues. After these checks, take your vehicle for a test drive to observe the cruise control's behavior, noting any irregularities such as failure to engage or maintain speed. If these steps do not resolve the issue, or if the problem seems complex, consulting a professional mechanic or a Mercedes-Benz service center is advisable for further diagnosis and repair.

What are the common problems that could cause the cruise control to stop working in a 2022 Mercedes-Benz EQS 450+?

When troubleshooting the cruise control system in a 2022 Mercedes-Benz EQS 450+, it's essential to understand the common problems that may lead to its failure. One prevalent issue is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can disrupt the cruise control function, as the system is designed to disengage when the brake pedal is pressed. Another potential culprit is a malfunctioning throttle actuator, which can impede the cruise control's ability to adjust the throttle position effectively. Electrical issues, such as blown fuses or wiring problems, can also play a significant role in cruise control malfunctions, as can software glitches within the vehicle's control module. By identifying and addressing these common problems, DIY enthusiasts can take the first steps toward restoring the cruise control functionality in their EQS 450+.

How urgent is it to address the malfunctioning cruise control in my 2022 Mercedes-Benz EQS 450+?

Addressing a malfunctioning cruise control in your 2022 Mercedes-Benz EQS 450+ is of utmost importance due to the immediate safety concerns it presents. A faulty system can lead to erratic acceleration or deceleration, which not only endangers you but also other drivers on the road. Additionally, the primary purpose of cruise control is to enhance your driving experience by maintaining a steady speed, and any malfunction can significantly detract from your comfort, especially during long journeys. Moreover, neglecting this issue could result in more severe complications within the vehicle's systems, leading to costly repairs that could have been avoided with timely intervention. Therefore, it is crucial to prioritize the repair of your cruise control system to ensure your safety, maintain driving comfort, and protect your vehicle from further damage.

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