1996 Mercedes-Benz S320 Cruise Control Isn't Working

Fixing Cruise Control Issues in 1996 Mercedes-Benz S320

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Reviewed by
Andrew Hajjar
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 1996 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 1996 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 1996 Mercedes-Benz S320?

When troubleshooting the non-functional cruise control in a 1996 Mercedes-Benz S320, it's essential to adopt a systematic diagnostic approach. Begin by checking the fuse associated with the cruise control system, as a blown fuse can often be the simplest explanation for the malfunction. Next, inspect the wiring for any signs of damage, corrosion, or loose connections, as these can disrupt the electrical flow necessary for the system to operate. Following this, test the cruise control switch to ensure it is functioning correctly; checking for continuity can reveal whether the switch is the culprit. Additionally, examine the vacuum lines, as they play a crucial role in the operation of the cruise control system; any leaks or blockages here can lead to failure. Utilizing a diagnostic scanner to check for error codes can provide further insights into potential issues. Don’t forget to verify the brake and clutch switches, as these components must be operational for the cruise control to engage. Lastly, inspect the throttle cable to ensure it is not damaged or stuck, as this can also hinder the system's performance. By following these steps, you can effectively diagnose and potentially resolve the cruise control issues in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 1996 Mercedes-Benz S320?

When troubleshooting the cruise control system in a 1996 Mercedes-Benz S320, 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 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 speed sensor, which can provide inaccurate speed readings and cause the cruise control to malfunction. It's also important to check for a blown fuse in the cruise control system, as this can completely disable its functionality. Lastly, problems with the cruise control module itself can result in operational failures. By identifying these common issues, DIY enthusiasts can better diagnose and address the problems affecting their vehicle's cruise control system.

How urgent is it to repair the non-functioning cruise control in a 1996 Mercedes-Benz S320?

When evaluating the urgency of repairing the non-functioning cruise control in a 1996 Mercedes-Benz S320, it is essential to recognize the implications of neglecting this issue. While it may not pose an immediate safety threat like malfunctioning brakes, a faulty cruise control system can lead to increased driver fatigue and distraction, particularly during long drives. This can compromise overall safety on the road, as maintaining a consistent speed is crucial for safe highway travel. Additionally, the absence of cruise control diminishes driving comfort, making extended journeys more taxing on the driver. Furthermore, from a financial perspective, a fully functional cruise control system can enhance the vehicle's resale value; potential buyers often seek vehicles with all features in working order. Therefore, while the repair may not be an emergency, addressing the non-functioning cruise control promptly is advisable to ensure a safer, more comfortable driving experience and to protect the vehicle's value.

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1996 Mercedes-Benz S320 Cruise Control Issues & Repairs