Mercedes-Benz SL63 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz SL63 AMG 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 Mercedes-Benz SL63 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 Mercedes-Benz SL63 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.

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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz SL63 AMG

When troubleshooting cruise control issues in your Mercedes-Benz SL63 AMG, it's essential to adopt a systematic diagnostic approach. Start by checking the simplest components first, such as the cruise control switch and any blown fuses, as these are often the most straightforward fixes. Next, inspect the brake light and brake switch, since a malfunction here can disable the cruise control system. If these elements are functioning correctly, move on to examining the throttle actuation, as problems in this area can directly affect cruise control performance. Additionally, keep an eye on the check engine light; if it’s illuminated, it may indicate underlying engine or transmission issues that could be impacting the cruise control system. By following this methodical approach, you can effectively identify and resolve the common causes of cruise control malfunctions, ensuring a smoother driving experience. If the problem persists after these checks, it may be time to consult a professional mechanic for a more in-depth diagnosis.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz SL63 AMG?

When troubleshooting cruise control malfunctions in a Mercedes-Benz SL63 AMG, it's essential to understand the common problems that may arise. One of the primary culprits is a defective brake pedal switch, which can cause the system to disengage if it mistakenly signals that the brakes are being applied. Additionally, a dead battery can hinder the operation of electronic components, including cruise control, so ensuring the battery is in good condition is crucial. Another potential issue is a faulty ABS wheel speed sensor, which can trigger warning lights and disrupt the cruise control functionality. If the system operates intermittently, it may indicate underlying electronic or mechanical issues that require thorough inspection. Lastly, a malfunctioning cruise control amplifier can also lead to problems, and replacing it with a compatible part may restore functionality. By being aware of these common issues, DIY enthusiasts can effectively diagnose and address cruise control problems in their SL63 AMG, ensuring a smoother driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz SL63 AMG?

When the cruise control in your Mercedes-Benz SL63 AMG is not functioning, it is crucial to address the issue without delay. Ignoring symptoms such as a defective brake pedal switch, blown fuses, or faulty sensors can not only compromise your driving experience but also pose significant safety risks. For instance, if the cruise control is disabled due to an ESP error, it may prevent you from maintaining a steady speed, increasing the likelihood of accidents. Additionally, unresolved issues with the throttle control system or ABS can lead to more severe mechanical problems down the line, resulting in costly repairs. Therefore, it is advisable to conduct a thorough inspection of the potential causes, including checking the brake light switch and wheel speed sensor, and to seek professional assistance if necessary. Taking prompt action can help ensure your vehicle remains safe and reliable on the road.

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