2018 Mercedes-Benz Maybach S650 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2018 Mercedes-Benz Maybach S650

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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 2018 Mercedes-Benz Maybach S650 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.

What steps should I take to diagnose the non-functioning cruise control in my 2018 Mercedes-Benz Maybach S650?

To effectively diagnose the non-functioning cruise control in your 2018 Mercedes-Benz Maybach S650, 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 the steering wheel to ensure they are operational, as malfunctioning buttons can hinder functionality. Following this, verify the speed sensors, as faulty sensors can disrupt the cruise control system. It’s also essential to check the brake pedal switch, since a defective switch can disable cruise control entirely. If these initial checks do not reveal the problem, utilize a diagnostic scanner to identify any error codes that may indicate specific issues within the cruise control system. Should these steps fail to resolve the issue, consulting a professional mechanic or an authorized Mercedes-Benz service center is advisable for a comprehensive diagnosis and repair. This methodical approach not only helps in identifying the problem efficiently but also saves time and resources in the troubleshooting process.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz Maybach S650?

When dealing with a malfunctioning cruise control system in a 2018 Mercedes-Benz Maybach S650, it's essential to understand the common problems that may be at play. One frequent culprit is a faulty speed sensor, which can disrupt the system's ability to maintain the desired speed. Additionally, a malfunctioning brake light switch can cause the cruise control to disengage unexpectedly, even when the brakes are not applied. Another potential issue is a throttle actuator malfunction, which can hinder the system's capability to adjust the vehicle's speed effectively. Furthermore, a defective cruise control module may prevent the system from engaging or maintaining speed altogether. Lastly, electrical problems, such as wiring issues or faults within the cruise control system, can also lead to operational failures. For those looking to troubleshoot these issues, a thorough inspection of these components can help identify the root cause and guide necessary repairs.

How urgent is it to address the malfunctioning cruise control in a 2018 Mercedes-Benz Maybach S650?

Addressing a malfunctioning cruise control system in a 2018 Mercedes-Benz Maybach S650 is of utmost urgency due to the significant safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, which can result in dangerous driving situations. Moreover, a faulty cruise control system can disrupt the overall driving experience, making it difficult for the driver to maintain a consistent speed, thereby increasing the likelihood of erratic driving patterns. This not only affects comfort but can also lead to higher fuel consumption, as the vehicle may not operate efficiently. Additionally, delaying repairs can exacerbate the problem, potentially leading to more extensive damage to the vehicle's systems, which could result in higher repair costs down the line. Therefore, it is crucial to address any cruise control issues promptly to ensure safety, enhance driving performance, and avoid unnecessary expenses.

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