2019 Mercedes-Benz SL63 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2019 Mercedes-Benz SL63 AMG

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Reviewed by
Bo Fader
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 2019 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 2019 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.

What are the steps to diagnose the cruise control issue in a 2019 Mercedes-Benz SL63 AMG?

To effectively diagnose a cruise control issue in a 2019 Mercedes-Benz SL63 AMG, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse can easily disrupt functionality. Next, examine the cruise control buttons on the steering wheel for any signs of sticking or malfunction, which could prevent proper operation. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying electronic issues. Additionally, verify the functionality of the vehicle's speed sensors, as they are integral to the cruise control system's performance. It's also important to inspect the wiring connections associated with the cruise control system for any loose or damaged wires that could hinder operation. Finally, test the cruise control module to ensure it is sending the correct signals. If these steps do not resolve the issue, consulting a professional mechanic or an authorized Mercedes-Benz service center is recommended for further diagnosis and repair. This methodical approach not only helps in identifying the problem but also ensures that you cover all potential causes efficiently.

What are the common problems that could cause the cruise control to stop working in a 2019 Mercedes-Benz SL63 AMG?

When troubleshooting the cruise control system in a 2019 Mercedes-Benz SL63 AMG, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to detect the vehicle's speed accurately, preventing it from engaging or maintaining the desired speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it may not signal the cruise control to disengage when the brake pedal is pressed, leading to operational failures. Another potential culprit is the throttle actuator, which controls the engine's throttle opening and is vital for maintaining speed. Electrical problems, such as blown fuses or wiring issues, can also hinder the cruise control's functionality, as can vacuum leaks in the engine that disrupt the necessary vacuum pressure for operation. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control system in your vehicle.

How urgent is it to address the malfunctioning cruise control in a 2019 Mercedes-Benz SL63 AMG?

Addressing a malfunctioning cruise control in a 2019 Mercedes-Benz SL63 AMG is of utmost importance due to the significant safety risks and potential for further vehicle damage. When cruise control fails, it can lead to unpredictable speed changes, which are particularly dangerous during long drives or on highways where maintaining a constant speed is crucial for safe driving. Ignoring this issue not only increases the likelihood of accidents but can also exacerbate existing problems within the vehicle's electronic systems, leading to more extensive and costly repairs. Therefore, it is essential to act quickly and consult a qualified mechanic or an authorized Mercedes-Benz service center to diagnose and resolve the issue. By prioritizing this repair, you ensure the vehicle's optimal performance and safety, allowing for a more secure driving experience.

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