2021 Mercedes-Benz Metris Cruise Control Isn't Working

Troubleshooting Common Issues with the Cruise Control System in Your 2021 Mercedes-Benz Metris

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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 2021 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 2021 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 steps should I take to diagnose the cruise control issue in my 2021 Mercedes-Benz Metris?

To effectively diagnose the cruise control issue in your 2021 Mercedes-Benz Metris, start with a systematic approach that prioritizes simpler checks before moving on to more complex diagnostics. Begin by inspecting the cruise control fuse, as a blown fuse is a common and easily fixable problem that can disrupt the system's functionality. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can lead to engagement issues. If these initial checks do not reveal the problem, utilize an OBD-II scanner to identify any error codes that may indicate specific malfunctions within the cruise control system. Following this, assess the vehicle's speed sensors, which are critical for the cruise control's operation; any faults here can significantly impact performance. Additionally, inspect the wiring connections associated with the cruise control system for signs of damage or corrosion, as poor connections can lead to failures. Finally, if all else checks out, test the cruise control module itself to confirm it is functioning correctly. By following this structured diagnostic approach, you can efficiently identify and address the root cause of the cruise control issue in your vehicle.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz Metris?

When troubleshooting cruise control issues in a 2021 Mercedes-Benz Metris, it's essential to consider several common problems that could be at play. A faulty cruise control switch is often the first suspect, as it can hinder the system's ability to engage or disengage properly. Additionally, a malfunctioning speed sensor may disrupt the system's capacity to maintain a consistent speed, leading to erratic behavior. Another critical component to check is the brake light switch; if this switch is defective, it can cause the cruise control to disengage unexpectedly when the brakes are applied. Furthermore, issues with the throttle actuator can prevent the cruise control from adjusting the vehicle's speed accurately, while electrical faults, such as blown fuses or wiring issues, can also interfere with the system's operation. By systematically examining these components, DIYers can identify the root cause of the cruise control malfunction and determine whether a simple fix is possible or if professional assistance is needed.

How urgent is it to address the non-functioning cruise control in a 2021 Mercedes-Benz Metris?

When it comes to the non-functioning cruise control in a 2021 Mercedes-Benz Metris, understanding the urgency of the situation is crucial for any DIY enthusiast. While the immediate safety risks may not be apparent, neglecting this issue can lead to a less enjoyable driving experience, particularly on long trips where cruise control is invaluable for maintaining speed and reducing fatigue. Additionally, a malfunctioning system can contribute to increased wear on the vehicle's engine and transmission, potentially leading to more significant and costly repairs down the line. Therefore, it is advisable to investigate the root cause of the malfunction sooner rather than later. This could involve checking the cruise control switch, inspecting the brake pedal position sensor, or examining the vehicle's fuses. By addressing these issues promptly, you not only enhance your driving comfort but also safeguard the overall performance and longevity of your Metris.

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2021 Mercedes-Benz Metris Cruise Control Issues & Solutions