2014 Mercedes-Benz SLK55 AMG Cruise Control Isn't Working

Fixing Cruise Control Issues in 2014 Mercedes-Benz SLK55 AMG

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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 2014 Mercedes-Benz SLK55 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 2014 Mercedes-Benz SLK55 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.

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario only partial functionality will be lost. This means that the cruise control may come on, but that it will not increase in speed automatically, or the cancel button does not work leading the driver to cancel cruise control with the foot brake. In some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to lack of functionality.

What are the initial diagnostic steps to troubleshoot the non-functional cruise control in a 2014 Mercedes-Benz SLK55 AMG?

When faced with a non-functional cruise control in your 2014 Mercedes-Benz SLK55 AMG, it's essential to adopt a systematic diagnostic approach. Start by checking the cruise control fuse, as a blown fuse can be a simple yet common culprit behind the malfunction. Next, verify the functionality of the cruise control switch; a faulty switch may prevent the system from engaging. It's also crucial to examine the speed sensors, as any issues here can directly affect the cruise control's performance. Utilizing a diagnostic scanner to check for error codes can provide further insights into underlying problems. Lastly, inspect the wiring connections associated with the cruise control system for any signs of damage or loose connections, as these can lead to operational failures. By following these steps, you can effectively narrow down the potential causes of the issue and take appropriate action to restore your cruise control functionality.

What are the common problems that could cause the cruise control to stop working in a 2014 Mercedes-Benz SLK55 AMG?

When troubleshooting the cruise control system in a 2014 Mercedes-Benz SLK55 AMG, it's essential to consider several common problems that could lead to its malfunction. One of the primary culprits is a faulty speed sensor, which is crucial for the system to accurately gauge the vehicle's speed; if this sensor fails, the cruise control may not engage or maintain the desired speed. Additionally, issues with the brake light switch can disrupt the system, as it is designed to deactivate cruise control when the brakes are applied. Another potential issue is a malfunctioning throttle actuator, which can hinder the cruise control's ability to adjust the throttle position effectively. Furthermore, a defective cruise control module may cause the entire system to cease functioning, necessitating repair or replacement. Lastly, electrical problems such as wiring issues or blown fuses can also impede the operation of the cruise control system. By understanding these common issues, DIY enthusiasts can better diagnose and address the problems affecting their vehicle's cruise control functionality.

How urgent is it to address the non-functioning cruise control in a 2014 Mercedes-Benz SLK55 AMG?

When it comes to the non-functioning cruise control in a 2014 Mercedes-Benz SLK55 AMG, the urgency of addressing the issue should not be underestimated. While the malfunction may not pose an immediate safety risk like failing brakes or steering, it can still lead to significant inconveniences and potential complications if left unattended. Cruise control is designed to enhance driving comfort, particularly during long journeys, by maintaining a steady speed and reducing driver fatigue. Ignoring this feature could diminish your overall driving experience and lead to increased wear on other vehicle components as you manually manage speed. Moreover, delaying repairs might result in more extensive damage or complications within the vehicle's electronic systems, ultimately escalating repair costs. Therefore, while it may not be the most critical issue, addressing a malfunctioning cruise control promptly is essential for maintaining the vehicle's performance and ensuring a safe, enjoyable driving experience.

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