Mercedes-Benz SLK32 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz SLK32 AMG and How to Fix Them

Find Repair Location
Reviewed by
Bo Fader
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 Mercedes-Benz SLK32 AMG 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 Mercedes-Benz SLK32 AMG 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz SLK32 AMG

When troubleshooting cruise control issues in your Mercedes-Benz SLK32 AMG, start with the basics to identify the root cause of the problem. Begin by checking the battery voltage; a reading below 12.1 volts can lead to various electrical malfunctions, including cruise control failure. Next, inspect the brake light switch, as a malfunction here can cause the cruise control to disengage unexpectedly. If the brake lights are functioning properly, examine the cruise control control switch itself for any signs of wear or damage. Additionally, ensure that the wheel speed sensors and reluctor rings are in good condition, as these components are crucial for the cruise control system's operation. If you encounter an inoperative warning message on the instrument cluster, it may indicate a more complex issue, possibly related to the BAS/ESP systems. By following this diagnostic approach, you can systematically address the most common issues and restore the functionality of your cruise control system.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz SLK32 AMG?

When diagnosing cruise control malfunctions in a Mercedes-Benz SLK32 AMG, it's crucial to consider several common problems that could be at play. A faulty speed sensor is often a primary culprit, as it plays a vital role in relaying the vehicle's speed to the cruise control system. If this sensor fails, the system may struggle to maintain a consistent speed. Additionally, issues with the brake light switch can prevent the cruise control from engaging or disengaging correctly, leading to unexpected behavior. Another potential issue is a malfunctioning throttle actuator, which can cause erratic cruise control performance. It's also important to check for vacuum leaks in the engine, as these can disrupt the power needed for the cruise control to function smoothly. Lastly, electrical problems, such as damaged wiring or blown fuses, can significantly impact the system's operation. By understanding these common issues, DIYers can better diagnose and address cruise control problems in their SLK32 AMG, ensuring a safer and more enjoyable driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz SLK32 AMG?

When the cruise control in your Mercedes-Benz SLK32 AMG is not functioning, it is crucial to address the issue promptly, as neglecting it can lead to safety risks and further complications. A faulty ABS sensor at any wheel can disable not only the cruise control but also critical systems like ABS and stability control, which are essential for safe driving. Additionally, a defective brake pedal switch or a blown fuse are common culprits that can prevent the cruise control from engaging. If the ABS light is illuminated on your dashboard, it may indicate a problem that could also affect cruise control functionality. Furthermore, a malfunctioning brake light switch can disrupt the system, and while a faulty wheel sensor typically triggers a fault code, it’s still worth checking. Lastly, ensure that the cruise control switch engaged by the brake pedal is functioning correctly, as a failed switch can hinder operation. Given the potential safety implications and the risk of more significant damage, it is advisable to investigate these issues thoroughly and seek professional assistance if necessary.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.