1997 Mercedes-Benz C280 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 1997 Mercedes-Benz C280 and How to Fix Them

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Reviewed by
Aisha
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 C280 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 C280 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 1997 Mercedes-Benz C280?

When troubleshooting the non-functional cruise control in a 1997 Mercedes-Benz C280, it's crucial to follow a structured diagnostic approach that begins with the simplest checks. Start by inspecting the fuse related to the cruise control system, as a blown fuse is often the most straightforward issue to resolve. If the fuse is intact, the next step is to verify the functionality of the speed sensor, which is essential for the cruise control to operate correctly. Should the speed sensor be working, examine the brake pedal switch, since a faulty switch can inhibit the cruise control from engaging. Additionally, inspect the wiring connections for any signs of damage or looseness, as these can disrupt the system's performance. Finally, utilizing a diagnostic scanner to check for error codes can uncover hidden problems that may not be immediately visible. By systematically addressing these areas, you can effectively identify and resolve the underlying issues affecting the cruise control system in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 1997 Mercedes-Benz C280?

When dealing with a malfunctioning cruise control system in a 1997 Mercedes-Benz C280, it's essential to consider several common problems that could be at play. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control's operation; if this switch fails, it may prevent the system from engaging or cause it to disengage unexpectedly when the brake pedal is pressed. Additionally, vacuum leaks can significantly impact the cruise control's functionality, as they disrupt the necessary vacuum pressure required for proper operation. Another potential issue is a defective speed sensor, which can lead to incorrect speed readings and cause the cruise control to malfunction or disengage. It's also important to check for a blown fuse in the cruise control system, as this can completely disable the feature. Lastly, problems with the throttle cable, such as damage or sticking, can hinder the cruise control's ability to maintain the desired speed. By systematically addressing these common issues, DIY enthusiasts can effectively diagnose and resolve cruise control problems in their Mercedes-Benz C280.

How urgent is it to repair the non-functioning cruise control in a 1997 Mercedes-Benz C280?

When considering the urgency of repairing the non-functioning cruise control in a 1997 Mercedes-Benz C280, it is crucial to recognize the potential safety risks and long-term implications of inaction. A malfunctioning cruise control system not only diminishes driving comfort but can also lead to increased driver fatigue, particularly on long trips where maintaining a steady speed is essential. Moreover, the underlying issues that may cause cruise control failure, such as problems with the vehicle's electronics or sensors, could affect other critical systems, leading to more significant and costly repairs down the line. Ignoring these symptoms can escalate into serious safety concerns, especially on highways where consistent speed is vital for safe driving. Therefore, addressing the cruise control issue promptly is not just about convenience; it is a necessary step to ensure the safety and reliability of your vehicle, ultimately saving you time and money in the long run.

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1997 Mercedes-Benz C280 Cruise Control Issues & Repairs