1997 Mercedes-Benz S320 Cruise Control Isn't Working

Fixing Cruise Control Issues in 1997 Mercedes-Benz S320

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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 1997 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 1997 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-functioning cruise control in a 1997 Mercedes-Benz S320?

When troubleshooting the non-functioning cruise control in a 1997 Mercedes-Benz S320, it's essential to adopt a systematic diagnostic approach. Start by checking the fuse box to ensure the cruise control fuse is intact, as a blown fuse can be a simple yet common issue. Next, inspect the cruise control switch located on the steering wheel to confirm it is operating correctly; a malfunctioning switch can prevent the system from engaging. Additionally, verify that the brake lights are functioning properly, since a faulty brake light switch can inadvertently disable the cruise control. It's also crucial to examine the vehicle's speed sensors, as they are integral to the cruise control system's operation. Finally, consider scanning the vehicle's onboard computer 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 issue with your cruise control, making your DIY troubleshooting efforts more efficient.

What are the common problems that could cause the cruise control to stop working in a 1997 Mercedes-Benz S320?

When dealing with cruise control issues in a 1997 Mercedes-Benz S320, it's essential to consider several common problems that may be at play. One of the primary culprits is a defective brake pedal switch, which can prevent the cruise control from engaging or cause it to disengage unexpectedly. Additionally, a dead battery or malfunctioning components within the cruise control system can disrupt its functionality, so checking the battery and related sensors is crucial. Furthermore, throttle-related issues, such as a sticking throttle or improper calibration, can also lead to cruise control failure. By systematically examining these areas, DIYers can effectively diagnose and potentially resolve the cruise control problems in their vehicle, ensuring a smoother driving experience.

How urgent is it to repair the non-functioning cruise control in a 1997 Mercedes-Benz S320?

Repairing the non-functioning cruise control in a 1997 Mercedes-Benz S320 should be considered a priority, as neglecting this issue can lead to several negative consequences. First and foremost, safety is paramount; without cruise control, drivers may experience increased fatigue and distraction during long drives, which can elevate the risk of accidents. Additionally, the comfort factor cannot be overlooked; cruise control allows for a more relaxed driving experience, reducing the strain on the driver's foot during extended trips. Furthermore, addressing this repair can positively influence the vehicle's resale value; potential buyers are often wary of purchasing cars with known issues, and a functioning cruise control system can enhance the car's appeal. Lastly, while the malfunctioning cruise control may not directly affect the vehicle's mechanical operation, it is an integral part of the car's overall functionality. Therefore, timely repair of the cruise control system is advisable to ensure safety, comfort, and the long-term value of your Mercedes-Benz S320.

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1997 Mercedes-Benz S320 Cruise Control Malfunction Guide