2016 Mercedes-Benz SLK350 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Mercedes-Benz SLK350 and How to Fix Them

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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 2016 Mercedes-Benz SLK350 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 2016 Mercedes-Benz SLK350 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-functioning cruise control in a 2016 Mercedes-Benz SLK350?

When troubleshooting the non-functioning cruise control in a 2016 Mercedes-Benz SLK350, start with the simplest solutions before moving on to more complex diagnostics. Begin by checking the cruise control fuse in the fuse box; a blown fuse can easily disrupt the system's functionality. Next, ensure that the cruise control settings are correctly configured according to the vehicle's manual, as incorrect settings can prevent activation. If these initial checks do not resolve the issue, use a diagnostic scanner to look for any error codes that may indicate underlying problems within the cruise control system. Additionally, inspect the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these controls are crucial for operation. Finally, verify that the brake pedal switch is functioning properly, since cruise control systems are designed to disengage when the brake is applied. By following this structured approach, you can effectively diagnose and potentially resolve the cruise control issue in your SLK350.

What are the common problems that could cause the cruise control to stop working in a 2016 Mercedes-Benz SLK350?

When troubleshooting the cruise control system in a 2016 Mercedes-Benz SLK350, it's essential to understand the common problems that may lead to its malfunction. One of the primary culprits is a faulty speed sensor, which can hinder the system's ability to accurately gauge the vehicle's speed, preventing it from engaging or maintaining the desired speed. Additionally, issues with the brake light switch can disrupt the cruise control functionality, as this switch is designed to deactivate the system when the brakes are applied. Another potential issue is a malfunctioning throttle actuator, which can impede the cruise control's ability to adjust the throttle position effectively. Electrical problems, including blown fuses or wiring issues, can also play a significant role in cruise control failure, as can vacuum leaks within the system that compromise its ability to maintain speed. By identifying and addressing these common issues, DIY enthusiasts can take the first steps toward restoring the cruise control functionality in their vehicle.

How urgent is it to address the malfunctioning cruise control in a 2016 Mercedes-Benz SLK350?

When it comes to a malfunctioning cruise control system in a 2016 Mercedes-Benz SLK350, the urgency of addressing the issue cannot be overstated. A faulty cruise control can lead to unpredictable vehicle behavior, such as sudden acceleration or deceleration, which poses a significant safety risk not only to the driver but also to other road users. Moreover, neglecting this problem can detract from the overall driving experience, making it inconvenient to utilize this feature as intended. Beyond immediate safety concerns, a malfunctioning cruise control can also negatively impact fuel efficiency, leading to increased costs at the pump and potentially causing strain on other vehicle components. By addressing the issue promptly, you can prevent further complications that may result in more extensive and costly repairs down the line. Therefore, it is crucial to prioritize the repair of your cruise control system to ensure both your safety and the optimal performance of your vehicle.

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2016 Mercedes-Benz SLK350 Cruise Control Issues & Fix Costs