2008 Mercedes-Benz S63 AMG Cruise Control Isn't Working

Diagnosing Common Issues with Cruise Control in Your 2008 Mercedes-Benz S63 AMG and How to Fix Them

Find Repair Location
Reviewed by
Devin Cabugcal
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 2008 Mercedes-Benz S63 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 2008 Mercedes-Benz S63 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.

What are the steps to diagnose the non-functioning cruise control in a 2008 Mercedes-Benz S63 AMG?

To effectively diagnose the non-functioning cruise control in your 2008 Mercedes-Benz S63 AMG, start with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Begin by inspecting the cruise control fuse located in the fuse box, as a blown fuse is a common and easily fixable issue. Next, examine the cruise control switch on the steering wheel to ensure it is operational, since a malfunctioning switch can prevent engagement. Following this, check the speed sensors, which are crucial for relaying the vehicle's speed to the cruise control system; any faults here can disrupt functionality. Utilizing a diagnostic scanner to scan for error codes can provide insights into specific problems affecting the cruise control system. Additionally, inspect the wiring and connections for any signs of damage or corrosion, as faulty wiring can hinder communication between components. Finally, test the cruise control module to confirm it is working correctly, as a defective module may be the root cause of the issue. If these steps do not resolve the problem, seeking assistance from a professional mechanic or an authorized Mercedes-Benz service center is advisable for further diagnosis and repair. This methodical approach not only helps in identifying the issue but also ensures that you address the simplest problems first, potentially saving time and resources.

What are the common problems that could cause the cruise control to stop working in a 2008 Mercedes-Benz S63 AMG?

When the cruise control in your 2008 Mercedes-Benz S63 AMG ceases to function, there are several common issues you can troubleshoot on your own. Start by checking the fuse related to the cruise control system, as a blown fuse can easily disrupt its operation. Next, inspect the brake pedal switch; if it’s faulty or not engaging properly, it may prevent the cruise control from activating. Additionally, consider the throttle system, as any irregularities can affect cruise control performance. A malfunctioning speed sensor can also be a culprit, as it provides essential data for the cruise control to maintain speed. Lastly, ensure that the brake lights are functioning correctly, as a bad brake switch can signal to the system that the brakes are engaged, disabling cruise control. By systematically examining these components, you may be able to identify and resolve the issue without needing to visit a mechanic.

How urgent is it to address the non-functioning cruise control in a 2008 Mercedes-Benz S63 AMG?

When it comes to a non-functioning cruise control in a 2008 Mercedes-Benz S63 AMG, the urgency of addressing the issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks and inconvenience during long drives. The cruise control system is designed to enhance driving comfort and efficiency, and its failure may indicate deeper electronic or sensor issues that could affect the vehicle's overall performance. By postponing repairs, you not only risk further complications that could escalate repair costs but also compromise your driving experience, especially on highways where maintaining a constant speed is crucial. Therefore, it is wise to prioritize the diagnosis and repair of the cruise control system to ensure the vehicle remains safe, efficient, and enjoyable to drive.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2008 Mercedes-Benz S63 AMG Cruise Control Issues & Solutions