2023 Mercedes-Benz CLS450 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2023 Mercedes-Benz CLS450 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2023 Mercedes-Benz CLS450 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 CLS450 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 cruise control issue in my 2023 Mercedes-Benz CLS450?

To effectively diagnose the cruise control issue in your 2023 Mercedes-Benz CLS450, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on your steering wheel for any signs of damage or wear that could hinder their operation. Utilizing an OBD-II scanner is crucial at this stage; it allows you to identify any error codes that may point to specific problems within the cruise control system. Following this, check the speed sensors, as they are integral to the system's performance. Ensure that all wiring connections related to the cruise control are secure and undamaged, as loose or frayed wires can lead to malfunctions. If these preliminary checks do not resolve the issue, proceed to test the cruise control module to confirm it is functioning correctly. Should you still encounter difficulties, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is advisable to ensure a thorough diagnosis and repair. By following this structured diagnostic approach, you can efficiently identify and address the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to malfunction in a 2023 Mercedes-Benz CLS450?

When dealing with cruise control malfunctions in a 2023 Mercedes-Benz CLS450, it's essential to understand the common problems that may arise. One frequent issue is faulty speed sensors, which can hinder the system's ability to maintain a consistent speed. Additionally, a malfunctioning brake light switch can prevent the cruise control from engaging or cause it to disengage unexpectedly, posing safety risks. Throttle control problems, such as a sticky throttle or issues with the throttle position sensor, can also disrupt cruise control functionality. Electrical problems, including blown fuses or wiring issues, may lead to system failures, while vacuum leaks in the engine can compromise the cruise control's ability to maintain speed. By identifying these potential issues, DIYers can take the necessary steps to troubleshoot and repair their cruise control system, ensuring a safer and more reliable driving experience.

How urgent is it to address the malfunctioning cruise control in a 2023 Mercedes-Benz CLS450?

When it comes to a malfunctioning cruise control system in your 2023 Mercedes-Benz CLS450, the urgency to address the issue cannot be overstated. A malfunctioning cruise control not only detracts from the convenience and enjoyment of driving but also poses significant safety risks. If the system fails to engage or disengage properly, it can lead to erratic vehicle behavior, increasing the likelihood of accidents. Moreover, neglecting this issue can result in higher fuel consumption, as the vehicle may not operate as efficiently as designed. This inefficiency can also lead to further wear and tear on other components, potentially escalating repair costs down the line. Therefore, for DIY enthusiasts, it is crucial to prioritize the diagnosis and repair of cruise control malfunctions promptly. By doing so, you not only enhance your driving experience but also ensure the safety and longevity of your vehicle.

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2023 Mercedes-Benz CLS450 Cruise Control Issues & Repairs