2012 Mercedes-Benz ML63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2012 Mercedes-Benz ML63 AMG

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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 2012 Mercedes-Benz ML63 AMG 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 2012 Mercedes-Benz ML63 AMG 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 steps to diagnose the non-functioning cruise control in a 2012 Mercedes-Benz ML63 AMG?

When diagnosing the non-functioning cruise control in a 2012 Mercedes-Benz ML63 AMG, it's essential to adopt a systematic approach that begins with the simplest potential issues before progressing to more complex diagnostics. Start by checking the cruise control fuse in the fuse box, as a blown fuse can often be the culprit behind the malfunction. Next, inspect the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent the system from engaging. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying electronic issues. Additionally, examining the speed sensors is crucial, as they are integral to the cruise control system's operation. Ensure that all wiring connections related to the cruise control are secure and free from damage, as loose or damaged wires can disrupt functionality. Finally, test the cruise control module to confirm it is sending the correct signals. If these steps do not resolve the issue, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is recommended for a thorough 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 2012 Mercedes-Benz ML63 AMG?

When diagnosing why the cruise control in a 2012 Mercedes-Benz ML63 AMG has stopped functioning, it's essential to consider several common issues that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging if it fails to signal that the brake pedal is pressed. Additionally, problems with the speed sensor can lead to inaccurate speed readings, causing the system to malfunction or disengage unexpectedly. Another potential issue is a malfunctioning throttle actuator, which can disrupt the vehicle's ability to maintain a constant speed, directly impacting cruise control performance. It's also important to check for vacuum leaks in the engine, as these can interfere with the operation of vacuum-operated components within the cruise control system. Lastly, electrical problems, such as blown fuses or wiring issues, can significantly hinder the cruise control's functionality. Addressing these common problems promptly can help restore the cruise control system to its intended operation.

How urgent is it to address the malfunctioning cruise control in a 2012 Mercedes-Benz ML63 AMG?

Addressing a malfunctioning cruise control system in a 2012 Mercedes-Benz ML63 AMG is crucial for both safety and vehicle performance. When cruise control fails, it can lead to erratic vehicle behavior, such as unexpected acceleration or deceleration, which poses a significant risk to the driver and others on the road. Additionally, these issues may signal deeper electronic system or sensor problems that could compromise the overall drivability of the vehicle. Ignoring these symptoms not only increases the likelihood of accidents but can also lead to higher fuel consumption and potential damage to other vehicle components, resulting in more costly repairs down the line. For DIY enthusiasts, it is essential to recognize that timely diagnosis and repair can prevent further complications, ensuring the vehicle remains reliable and safe to drive. Therefore, if you notice any signs of cruise control malfunction, it is advisable to investigate the issue promptly, whether through self-diagnosis or by consulting a qualified mechanic.

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2012 Mercedes-Benz ML63 AMG Cruise Control Issues & Repairs