1999 Mercedes-Benz S600 Cruise Control Isn't Working

Fixing Cruise Control Issues in 1999 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 1999 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 1999 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 1999 Mercedes-Benz S600?

When addressing a non-functional cruise control in a 1999 Mercedes-Benz S600, it's essential to adopt a systematic diagnostic approach. Start by inspecting the fuse box for any blown fuses related to the cruise control system, as this is a straightforward fix that can often resolve the issue. Next, examine the cruise control switch located on the steering wheel; ensure it is operational and not stuck. The brake pedal switch is another critical component to check, as it must function correctly to prevent the cruise control from engaging when the brake is applied. Additionally, verify the vehicle speed sensor, which is vital for the cruise control's performance, ensuring it is sending accurate speed data. Finally, utilize a diagnostic scanner to check for any error codes that may indicate specific problems within the cruise control system. By following these steps, you can effectively diagnose and potentially resolve the cruise control malfunction in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 1999 Mercedes-Benz S600?

When dealing with cruise control issues in a 1999 Mercedes-Benz S600, 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 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's functionality, leading to a complete failure of the cruise control feature. Another potential issue is vacuum leaks within the cruise control system, which can hinder its ability to maintain speed. Furthermore, a malfunctioning speed sensor can affect the system's capacity to hold a constant speed, resulting in erratic behavior. Lastly, electrical issues, such as blown fuses or wiring problems, can also contribute to cruise control malfunctions. By identifying and addressing these common issues, DIYers 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 1999 Mercedes-Benz S600?

When evaluating the urgency of repairing the non-functioning cruise control in a 1999 Mercedes-Benz S600, it is essential to recognize the potential consequences of neglecting this issue. While it may not pose an immediate threat like a critical mechanical failure, the absence of functional cruise control can significantly impact driving safety. A malfunctioning system can lead to increased driver fatigue and distraction, particularly during long highway trips, which may elevate the risk of accidents. Additionally, the comfort of the driving experience is compromised, as the driver must constantly adjust speed, leading to discomfort on extended journeys. Furthermore, addressing this issue promptly can help maintain the vehicle's resale value; potential buyers are often wary of unresolved mechanical problems. Therefore, while the repair may not be an emergency, it is advisable to prioritize it to ensure a safer, more comfortable driving experience and to protect the vehicle's overall value.

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