2001 Mercedes-Benz SLK320 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2001 Mercedes-Benz SLK320

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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 2001 Mercedes-Benz SLK320 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 2001 Mercedes-Benz SLK320 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 2001 Mercedes-Benz SLK320?

When troubleshooting the non-functioning cruise control in your 2001 Mercedes-Benz SLK320, start with the simplest solutions before delving into more complex diagnostics. Begin by inspecting the fuses related to the cruise control system, as a blown fuse can often be the culprit behind the malfunction. Next, examine the brake pedal and throttle body; any issues with these components can directly impact cruise control functionality. Consult your vehicle's manual to locate the fuse box in the engine bay, and carefully remove the fuse associated with the cruise control to check for any visible damage. Additionally, keep an eye out for fault code P0564, which may indicate problems such as a faulty cruise control switch or issues within the switch harness. By systematically addressing these areas, you can effectively narrow down the potential causes of the cruise control failure and take the necessary steps toward a solution.

What are the common problems that could cause the cruise control to stop working in a 2001 Mercedes-Benz SLK320?

When troubleshooting the cruise control system in a 2001 Mercedes-Benz SLK320, it's essential to consider several common problems that could be affecting its functionality. One of the primary culprits is a faulty brake light switch, which is crucial for the cruise control to engage; if this switch malfunctions, the system may not activate as intended. Additionally, issues with the speed sensor can disrupt the system's ability to maintain a constant speed, leading to erratic behavior or complete failure of the cruise control. Another potential issue is vacuum leaks within the cruise control system, which can significantly impair its operation. Furthermore, a defective cruise control module may also be responsible for the malfunction, as it is the central component that controls the system. Lastly, electrical problems, including faulty wiring or poor connections, can prevent the cruise control from functioning properly. By systematically checking these areas, DIY enthusiasts can effectively diagnose and potentially resolve the issues plaguing the cruise control system in their SLK320.

How urgent is it to repair the non-functioning cruise control in a 2001 Mercedes-Benz SLK320?

Repairing the non-functioning cruise control in your 2001 Mercedes-Benz SLK320 should not be overlooked, as neglecting this issue can lead to more significant problems down the line. While it may seem like a minor inconvenience, a malfunctioning cruise control system can indicate deeper issues within the vehicle's control module, sensors, or throttle actuation. These components are crucial for the overall performance and safety of your car. If left unaddressed, you may experience increased fatigue during long drives due to the constant need for manual speed adjustments, which can detract from the comfort and convenience that cruise control is designed to provide. Moreover, a faulty cruise control system could potentially lead to erratic vehicle behavior, posing safety risks not only to you but also to other road users. Therefore, it is advisable to tackle this repair promptly, ensuring a smoother driving experience and maintaining the optimal functionality of your vehicle. For DIY enthusiasts, understanding the urgency of this repair can motivate you to investigate and resolve the issue before it escalates into a more complex and costly problem.

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