2006 Mercedes-Benz SL500 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2006 Mercedes-Benz SL500

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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 2006 Mercedes-Benz SL500 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 SL500 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 initial diagnostic steps to troubleshoot the non-functional cruise control in a 2006 Mercedes-Benz SL500?

When faced with a non-functional cruise control in your 2006 Mercedes-Benz SL500, it's crucial to adopt a systematic diagnostic approach. Start by checking the cruise control fuse in the fuse box; a blown fuse can often be the simplest explanation for the malfunction. Next, ensure that the cruise control settings on your dashboard are correctly configured, as incorrect settings can prevent the system from engaging. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues detected by the vehicle's onboard computer. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are vital for operation. Finally, while driving, attempt to engage the cruise control to assess its responsiveness; this practical test can reveal whether the system is entirely non-functional or if there are specific issues affecting its performance. By following these steps, you can effectively narrow down the potential causes of the cruise control problem and take appropriate action to resolve it.

What are the common problems that could cause the cruise control to stop working in a 2006 Mercedes-Benz SL500?

When dealing with cruise control issues in a 2006 Mercedes-Benz SL500, it's essential to understand the common problems that may arise. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since the system is designed to disengage when the brake pedal is pressed. Additionally, speed sensor issues can disrupt the cruise control's functionality, as accurate speed readings are crucial for the system's operation. Another potential problem is vacuum leaks within the cruise control system, which can significantly affect its performance. A defective cruise control module may also be at fault, requiring replacement to restore proper function. Lastly, electrical problems, such as blown fuses or wiring issues, can hinder the cruise control system's operation. By identifying and addressing these common issues, DIYers can effectively troubleshoot and resolve cruise control problems in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2006 Mercedes-Benz SL500?

Addressing the non-functioning cruise control in a 2006 Mercedes-Benz SL500 is a matter of urgency that should not be overlooked. A malfunctioning cruise control system can significantly compromise safety, particularly during long drives where maintaining a steady speed is crucial. The inability to rely on this feature can lead to driver fatigue and increased risk of accidents, making it essential to resolve the issue promptly. Additionally, a functioning cruise control system enhances driving comfort by allowing the driver to relax their foot and maintain a consistent speed without constant throttle adjustments. Ignoring the problem not only detracts from the overall driving experience but can also lead to more severe complications within the vehicle's systems. By addressing the cruise control malfunction early, you can prevent potential damage to other components, ultimately saving on costly repairs and ensuring a safer, more enjoyable driving experience.

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