2016 Mercedes-Benz C450 AMG Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2016 Mercedes-Benz C450 AMG 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 C450 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 2016 Mercedes-Benz C450 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.

What are the initial diagnostic steps to troubleshoot the non-functioning cruise control in a 2016 Mercedes-Benz C450 AMG?

When troubleshooting the non-functioning cruise control in a 2016 Mercedes-Benz C450 AMG, start with the simplest checks to avoid unnecessary complications. Begin by inspecting the cruise control fuse in the fuse box; a blown fuse can often be the culprit behind the system's failure. Next, ensure that the cruise control settings are correctly activated according to the manufacturer's guidelines, as incorrect settings can prevent the system from engaging. If these initial steps do not resolve the issue, use a diagnostic scanner to check for any error codes that may indicate deeper problems within the system. Additionally, examine the cruise control buttons on the steering wheel for any signs of damage or malfunction, as these can hinder operation. It's also crucial to test the brake pedal switch, since the cruise control is designed to disengage when the brake is pressed; a faulty switch could be the reason the system isn't functioning. Lastly, inspect the vehicle speed sensor, as it plays a vital role in maintaining speed. By systematically addressing these areas, you can effectively diagnose and potentially resolve the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2016 Mercedes-Benz C450 AMG?

When troubleshooting the cruise control system in a 2016 Mercedes-Benz C450 AMG, it's essential to understand the common problems that may lead to its malfunction. One prevalent issue is a faulty speed sensor, which can disrupt the system's ability to accurately gauge the vehicle's speed, preventing the cruise control from engaging or maintaining the desired speed. Additionally, problems with the brake light switch can cause the cruise control to disengage unexpectedly, as this switch is designed to interrupt the system when the brake pedal is pressed. Another potential culprit is a malfunctioning throttle actuator, which plays a crucial role in controlling the engine's throttle opening and can hinder the cruise control's performance. Furthermore, a defective cruise control module may impede communication between various system components, leading to operational failures. Lastly, electrical issues such as wiring faults or blown fuses can also contribute to the cruise control's inability to function correctly. By identifying and addressing these common problems, DIY enthusiasts can effectively diagnose and potentially resolve the cruise control issues in their vehicle.

How urgent is it to address the malfunctioning cruise control in a 2016 Mercedes-Benz C450 AMG?

When it comes to a malfunctioning cruise control system in a 2016 Mercedes-Benz C450 AMG, the urgency of addressing the issue cannot be overstated. A faulty cruise control can lead to erratic speed changes, posing significant safety risks, particularly during highway driving where maintaining a consistent speed is crucial. Moreover, such malfunctions may signal deeper electronic system or sensor problems that could compromise other vehicle functions, leading to more extensive and costly repairs if left unchecked. Ignoring these symptoms not only jeopardizes your safety but can also result in decreased fuel efficiency and increased wear on the vehicle, ultimately affecting its longevity. Therefore, it is essential to prioritize the diagnosis and repair of cruise control issues promptly, ensuring both your safety and the optimal performance of your Mercedes-Benz.

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2016 Mercedes-Benz C450 AMG Cruise Control Issues & Repairs