2000 Mercedes-Benz SL500 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2000 Mercedes-Benz SL500

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Reviewed by
Aisha
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 2000 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 2000 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-functioning cruise control in a 2000 Mercedes-Benz SL500?

When troubleshooting the non-functioning cruise control in a 2000 Mercedes-Benz SL500, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown or damaged fuse can easily disrupt the system's operation. Next, inspect the cruise control switch located on the steering wheel to ensure it is functioning correctly; a malfunctioning switch can prevent engagement. It's also crucial to verify that the brake lights are operational, since a faulty brake light switch can inadvertently disable the cruise control. Additionally, examine the vehicle's speed sensors, as they are vital for the cruise control system to function properly. Finally, consider scanning the vehicle's onboard computer for any error codes that may provide insight into the underlying issue. By following these steps in order, you can effectively diagnose and potentially resolve the cruise control problem in your SL500.

What are the common problems that could cause the cruise control to stop working in a 2000 Mercedes-Benz SL500?

When troubleshooting cruise control issues in a 2000 Mercedes-Benz SL500, it's essential to consider several common problems that may be at play. One frequent culprit is the presence of bad fuel or debris in the intake, which can lead to intermittent errors affecting the system's performance. Additionally, components that are beginning to fail can cause sporadic functionality, making it crucial to inspect the condition of these parts. Tire compatibility is another significant factor; if new tires are installed on one axle while the other remains worn, this imbalance can disrupt the cruise control's operation. Furthermore, changes in tire specifications can impact the speed sensors, which are vital for the cruise control system to function correctly. By addressing these potential issues, you can effectively diagnose and restore the cruise control functionality in your vehicle.

How urgent is it to repair the non-functioning cruise control on a 2000 Mercedes-Benz SL500?

When evaluating the urgency of repairing the non-functioning cruise control on a 2000 Mercedes-Benz SL500, it is essential to recognize that while it may not pose an immediate safety risk like malfunctioning brakes or engine issues, neglecting this repair can lead to significant consequences. A malfunctioning cruise control system can distract the driver and complicate speed management, particularly on long drives, which may inadvertently compromise road safety. Additionally, the comfort and convenience that cruise control provides are invaluable during extended journeys, as it reduces driver fatigue and enhances the overall driving experience. Furthermore, issues with the cruise control may signal underlying problems with other vehicle components, which, if left unaddressed, could result in more extensive damage and costly repairs down the line. Therefore, while the urgency may not be critical, addressing the cruise control issue promptly is advisable to ensure a safe, comfortable, and well-performing vehicle.

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