2006 Mercedes-Benz SL65 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2006 Mercedes-Benz SL65 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
0%
25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a 2006 Mercedes-Benz SL65 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 2006 Mercedes-Benz SL65 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 2006 Mercedes-Benz SL65 AMG?

To effectively diagnose the non-functioning cruise control in your 2006 Mercedes-Benz SL65 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 vehicle's fuse box, as a blown fuse can often be the simplest explanation for the issue. Next, examine the cruise control buttons on the steering wheel to ensure they are not stuck or damaged, as this can prevent proper engagement. Following this, check the speed sensors, which are vital for the cruise control system's operation; any malfunction here can disrupt functionality. Utilizing a diagnostic scanner to scan for error codes can provide insights into any underlying issues within the onboard computer. Additionally, verify that the brake and clutch switches are operational, as faulty switches can inhibit cruise control engagement. Inspecting the wiring and connections for any signs of damage or looseness is also crucial, as these can lead to communication failures within the system. Finally, test the cruise control module to confirm it is sending the correct signals. If these steps do not resolve the issue, consulting a qualified mechanic may be necessary for further diagnosis and repair. By following this structured approach, you can efficiently identify and address the problem with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz SL65 AMG?

When diagnosing cruise control issues in a 2006 Mercedes-Benz SL65 AMG, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging by failing to signal that the brakes are not applied. Additionally, a malfunctioning speed sensor can disrupt the system's ability to maintain a constant speed, leading to operational failures. Vacuum leaks in the engine may also affect the cruise control's functionality, as these leaks can interfere with the vacuum-operated components responsible for regulating speed. Furthermore, a defective cruise control module can result in the system not responding to commands or failing to maintain the desired speed. Lastly, electrical problems such as wiring issues, blown fuses, or component failures can also contribute to cruise control malfunctions. By systematically addressing these potential issues, DIY enthusiasts can effectively troubleshoot and resolve cruise control problems in their SL65 AMG.

How urgent is it to address the non-functioning cruise control in a 2006 Mercedes-Benz SL65 AMG?

When it comes to the non-functioning cruise control in a 2006 Mercedes-Benz SL65 AMG, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be apparent, neglecting this issue can lead to a series of complications that could affect both the vehicle's performance and your driving experience. A malfunctioning cruise control system can diminish the convenience of long drives, increasing driver fatigue and potentially leading to distractions. Moreover, if left unaddressed, the underlying electrical issues that may be causing the cruise control failure could escalate, resulting in more significant and costly repairs down the line. Therefore, while it may not seem like an emergency, it is wise to investigate the problem sooner rather than later. By doing so, you not only restore the functionality of this valuable feature but also safeguard against further complications that could arise from neglecting the issue. Taking proactive steps to diagnose and repair the cruise control system will enhance your driving comfort and maintain the overall integrity of your vehicle.

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Diagnose Cruise Control Issues in 2006 SL65 AMG | RepairPal