2018 Mercedes-Benz Metris Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your 2018 Mercedes-Benz Metris and How to Fix Them

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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 2018 Mercedes-Benz Metris 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 2018 Mercedes-Benz Metris 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 2018 Mercedes-Benz Metris?

When troubleshooting the non-functioning cruise control in your 2018 Mercedes-Benz Metris, it's essential to adopt a systematic diagnostic approach. Begin by checking the cruise control fuse, as a blown fuse is a common and easily fixable issue that can prevent the system from operating. Next, inspect the cruise control buttons on the steering wheel to ensure they are responsive and not stuck, as malfunctioning buttons can disrupt functionality. Following this, verify the operation of the vehicle's speed sensors, since these components are critical for cruise control engagement; if they are faulty, they may need replacement. Utilizing a diagnostic scanner can also be beneficial, as it allows you to check for any error codes that may indicate specific problems within the cruise control system. Additionally, examine the brake and clutch switches, as these must function correctly for the cruise control to engage; any faults here could be the culprit. Finally, inspect the wiring and connections associated with the cruise control system for any signs of damage or corrosion, as compromised wiring can lead to operational failures. By methodically following these steps, you can effectively diagnose and potentially resolve the issues with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2018 Mercedes-Benz Metris?

When troubleshooting the cruise control system in a 2018 Mercedes-Benz Metris, 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 it from engaging or maintaining the desired speed. Additionally, the brake light switch plays a crucial role; if it malfunctions, it may fail to send the necessary signal to disengage the cruise control when the brake pedal is pressed. Another potential culprit is the throttle actuator, which regulates the engine's throttle opening; any issues here can hinder the system's performance. Electrical problems, such as wiring faults or blown fuses, can also impede the cruise control's functionality. Lastly, for vehicles utilizing vacuum-operated systems, leaks in the vacuum lines can significantly affect the ability to maintain speed. By identifying and addressing these common issues, DIY enthusiasts can effectively restore the cruise control functionality in their Metris.

How urgent is it to address the malfunctioning cruise control in a 2018 Mercedes-Benz Metris?

Addressing a malfunctioning cruise control in a 2018 Mercedes-Benz Metris is of utmost urgency due to the significant safety risks it poses. A malfunction can lead to unexpected acceleration or deceleration, creating hazardous driving conditions that could endanger both the driver and others on the road. Moreover, issues with the cruise control system may signal deeper problems within the vehicle's electronic systems or sensors, which can compromise overall performance and drivability. Neglecting these symptoms not only risks safety but can also lead to decreased fuel efficiency and increased wear on the vehicle, ultimately resulting in higher repair costs. By promptly diagnosing and repairing the cruise control issue, you can prevent further damage and ensure the vehicle remains reliable and safe for use. Therefore, it is crucial to take immediate action to address any cruise control malfunctions to maintain the integrity and performance of your Metris.

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2018 Mercedes-Benz Metris Cruise Control Issues & Repairs