1995 Mercedes-Benz S320 Cruise Control Isn't Working

Fixing Cruise Control Issues in 1995 Mercedes-Benz S320

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Reviewed by
Bo Fader
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 1995 Mercedes-Benz S320 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 1995 Mercedes-Benz S320 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 1995 Mercedes-Benz S320?

When troubleshooting the non-functional cruise control in a 1995 Mercedes-Benz S320, it's essential to adopt a systematic diagnostic approach. Start by checking the fuse box for any blown fuses related to the cruise control system, as this is a simple and quick fix that can often resolve the issue. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, examine the cruise control module for any signs of damage or malfunction, as this component is crucial for the system's functionality. Additionally, inspect the vacuum lines connected to the cruise control system for leaks or damage, as any air leaks can disrupt the system's operation. Finally, test the brake pedal switch to confirm it is functioning correctly, as a faulty switch can inadvertently disable the cruise control. By methodically working through these steps, you can effectively diagnose and potentially resolve the issues affecting your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 1995 Mercedes-Benz S320?

When dealing with a malfunctioning cruise control system in a 1995 Mercedes-Benz S320, it's essential to understand the common problems that could be at play. One of the primary culprits is a faulty brake light switch, which can prevent the cruise control from engaging if it fails to signal that the brakes are applied. Additionally, vacuum leaks within the system can disrupt the cruise control's ability to maintain a steady speed, leading to inconsistent performance. Another potential issue is a defective cruise control module, which may require replacement if it is not functioning correctly. Speed sensor problems can also arise, causing inaccuracies in speed readings that directly affect cruise control operation. Lastly, electrical issues, such as blown fuses or damaged wiring, can impede the system's functionality. By identifying and addressing these common problems, DIYers can effectively troubleshoot and restore the cruise control system in their vehicle.

How urgent is it to repair the non-functioning cruise control in a 1995 Mercedes-Benz S320?

While the non-functioning cruise control in a 1995 Mercedes-Benz S320 may not seem like an urgent repair, it is essential to recognize the implications of neglecting this issue. Cruise control plays a significant role in enhancing safety during long drives by allowing drivers to maintain a consistent speed, which can reduce fatigue and improve focus on the road. Additionally, a functional cruise control system contributes to overall driving comfort, particularly on highways where maintaining speed can alleviate the monotony of long trips. Furthermore, from a financial perspective, ensuring that all features of your vehicle are operational can positively impact its resale value. Therefore, while it may not be an immediate emergency, addressing the cruise control issue promptly can lead to a safer, more enjoyable driving experience and help preserve the vehicle's worth over time.

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