2002 Mercedes-Benz CLK320 Cruise Control Isn't Working

Fixing Cruise Control Issues in Your 2002 Mercedes-Benz CLK320

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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 2002 Mercedes-Benz CLK320 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 2002 Mercedes-Benz CLK320 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 steps to diagnose the cruise control issue in a 2002 Mercedes-Benz CLK320?

To effectively diagnose the cruise control issue in your 2002 Mercedes-Benz CLK320, start with the simplest checks before moving on to more complex diagnostics. Begin by inspecting the brake pedal switch, as a malfunction here can directly impact the cruise control system. Next, ensure that your battery is in good condition, as a dead or weak battery can disrupt electrical systems, including cruise control. If these initial checks do not reveal the problem, examine the ABS system, since faults in this area can also interfere with cruise control functionality. Pay attention to any warning lights on your dashboard, particularly the ETS and ABS lights, as their illumination may indicate issues with the brake light switch. If you have access to diagnostic tools, checking the speed sensors can provide further insights into potential problems. Lastly, consider any recent changes to your tires, as these can sometimes affect the cruise control system. By following this structured approach, you can systematically identify and address the underlying issues affecting your vehicle's cruise control.

What are the common problems that could cause the cruise control to stop working in a 2002 Mercedes-Benz CLK320?

When troubleshooting the cruise control system in a 2002 Mercedes-Benz CLK320, 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 if it fails to signal that the brake pedal has been pressed. Additionally, a defective cruise control module can disrupt the entire system, causing it to malfunction or not engage at all. Speed sensors also play a critical role; if they are not functioning correctly, the cruise control may not be able to maintain the desired speed. Another issue to consider is vacuum leaks, which can interfere with the cruise control mechanism's operation. Lastly, a faulty throttle actuator can hinder the system's ability to regulate speed effectively. By identifying and addressing these common issues, DIY enthusiasts can effectively diagnose and resolve cruise control problems in their CLK320, restoring functionality and enhancing driving comfort.

How urgent is it to address the non-functioning cruise control in a 2002 Mercedes-Benz CLK320?

When it comes to the non-functioning cruise control in a 2002 Mercedes-Benz CLK320, addressing the issue should not be overlooked, even if it may not seem immediately critical. While the absence of cruise control does not directly compromise the vehicle's safety or drivability, it can significantly detract from the overall driving experience, particularly on long journeys where maintaining a consistent speed is beneficial. Ignoring this issue could lead to increased driver fatigue and frustration, especially during extended highway drives where cruise control is typically utilized. Moreover, delaying repairs may allow underlying problems to escalate, potentially resulting in more complex and costly repairs in the future. Therefore, while it may not be an emergency, it is wise to prioritize the repair of the cruise control system to enhance driving comfort and prevent further complications down the line.

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