1998 Mercedes-Benz S600 Cruise Control Isn't Working

Fixing Cruise Control Issues in 1998 Mercedes-Benz S600

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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 1998 Mercedes-Benz S600 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 1998 Mercedes-Benz S600 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 1998 Mercedes-Benz S600?

When troubleshooting the non-functional cruise control in a 1998 Mercedes-Benz S600, start with the simplest checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse; a blown or damaged fuse can easily disrupt the system's functionality. Next, examine the cruise control switch located on the steering wheel to ensure it is operating correctly, as a faulty switch can prevent activation. Following this, assess the cruise control module for any signs of malfunction, as this component is crucial for system operation. Additionally, check the cruise control vacuum pump and its associated hoses for leaks or damage, as these can significantly impact performance. It's also important to verify the vehicle speed sensor, ensuring it accurately relays speed information to the cruise control system. Finally, utilize an onboard diagnostic scanner to check for any error codes that may indicate specific issues within the cruise control system. By systematically following these steps, you can effectively diagnose and address the problems affecting your cruise control.

What are the common problems that could cause the cruise control to stop working in a 1998 Mercedes-Benz S600?

When troubleshooting the cruise control system in a 1998 Mercedes-Benz S600, it's essential to understand the common problems that may lead to its failure. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging since it is designed to deactivate when the brake pedal is pressed. Additionally, vacuum leaks can significantly disrupt the system's functionality, as cruise control relies on consistent vacuum pressure to operate smoothly. Another potential issue is a defective speed sensor, which can provide inaccurate speed readings, causing the cruise control to malfunction or disengage unexpectedly. Furthermore, problems with the throttle actuator, whether due to wear and tear or electrical faults, can hinder the system's ability to maintain a steady speed. Lastly, various electrical problems, including blown fuses, faulty wiring, or a malfunctioning cruise control module, can also contribute to the system's failure. By identifying and addressing these common issues, DIY enthusiasts can effectively troubleshoot and restore the cruise control functionality in their vehicle.

How urgent is it to repair the non-functioning cruise control in a 1998 Mercedes-Benz S600?

Repairing the non-functioning cruise control in a 1998 Mercedes-Benz S600 should not be overlooked, as neglecting this issue can lead to several complications. While it may not seem like an immediate emergency, the failure of cruise control can significantly impact driving comfort and safety. Without this feature, drivers may experience increased fatigue during long trips, as they are required to maintain constant pressure on the accelerator. This can lead to distractions and a higher risk of accidents. Additionally, a malfunctioning cruise control system can affect fuel efficiency, resulting in unnecessary fuel consumption and increased costs over time. Moreover, if the underlying issue is related to electrical or mechanical components, delaying repairs could lead to more extensive damage, ultimately resulting in higher repair costs. Therefore, addressing the cruise control malfunction promptly is advisable to ensure a safer, more comfortable, and efficient driving experience.

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