2002 Mercedes-Benz S500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2002 Mercedes-Benz S500 and How to Fix Them

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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 2002 Mercedes-Benz S500 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 2002 Mercedes-Benz S500 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 2002 Mercedes-Benz S500?

To effectively diagnose the non-functioning cruise control in a 2002 Mercedes-Benz S500, it is essential to adopt a systematic diagnostic approach that begins with the simplest checks. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common issue that can easily disrupt the system's functionality. Next, verify the operation of the cruise control switch located on the steering wheel; a malfunctioning switch can prevent the cruise control from engaging. It is also crucial to examine the brake pedal switch, as this component is designed to deactivate the cruise control when the brake is pressed. If these preliminary checks do not reveal the issue, proceed to use a diagnostic scanner to check for any error codes that may indicate specific problems within the cruise control system. Additionally, inspect the vehicle speed sensor, since a faulty sensor can hinder the cruise control's ability to maintain a set speed. Lastly, check the wiring and connections related to the cruise control system for any signs of damage or corrosion, as compromised wiring can lead to malfunctions. By following this structured approach, you can efficiently identify and resolve the issues affecting your cruise control system, ensuring a smoother driving experience.

What are the common problems that could cause the cruise control to stop working in a 2002 Mercedes-Benz S500?

When dealing with cruise control issues in a 2002 Mercedes-Benz S500, it's essential to understand the common problems that may be at play. One of the primary culprits is a faulty brake light switch, which can prevent the system from engaging if it fails to detect when the brake pedal is pressed. Additionally, a defective cruise control module can disrupt the entire system, leading to a lack of functionality. Vacuum leaks are another frequent issue, as they can interfere with the system's operation by affecting the necessary pressure for engagement. Furthermore, a malfunctioning speed sensor can hinder the cruise control's ability to maintain a steady speed, resulting in erratic performance. Lastly, electrical issues, including damaged wiring or poor connections, can also contribute to cruise control failure. By identifying and addressing these potential problems, DIYers can effectively troubleshoot and restore the cruise control functionality in their vehicle.

How urgent is it to address the non-functioning cruise control in a 2002 Mercedes-Benz S500?

When it comes to the non-functioning cruise control in a 2002 Mercedes-Benz S500, the urgency of addressing this issue should not be underestimated. While it may not pose an immediate safety risk, neglecting the problem can lead to a diminished driving experience, particularly on long journeys where cruise control is most beneficial. The convenience of maintaining a steady speed without constant manual adjustments is a significant advantage, and its absence can result in driver fatigue and frustration. Moreover, failing to investigate the underlying cause of the malfunction could lead to more severe issues down the line, potentially resulting in costly repairs. Therefore, while it may not be an emergency, it is wise to prioritize the repair of the cruise control system to ensure optimal vehicle performance and enhance your overall driving comfort.

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2002 Mercedes-Benz S500 Cruise Control Issues & Solutions