2021 Mercedes-Benz Sprinter 2500 Cruise Control Isn't Working

Fixing Cruise Control Issues in 2021 Mercedes-Benz Sprinter 2500

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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 Sprinter 2500 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 Sprinter 2500 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 steps should I take to diagnose the non-functioning cruise control in my 2021 Mercedes-Benz Sprinter 2500?

To effectively diagnose the non-functioning cruise control in your 2021 Mercedes-Benz Sprinter 2500, begin with a systematic approach that prioritizes simpler checks before delving into more complex diagnostics. Start by inspecting the cruise control fuse in the fuse box, as a blown fuse is a common and easily fixable issue that can disrupt the system. Next, examine the cruise control buttons on the steering wheel to ensure they are operational, as faulty buttons can prevent engagement. Following this, verify the speed sensors, as any malfunction here can directly impact cruise control functionality. Utilizing a diagnostic scanner to check for error codes can provide valuable insights into any underlying issues. Additionally, inspect the wiring and connections associated with the cruise control system, as loose or damaged wiring can lead to malfunctions. If these preliminary checks do not resolve the issue, test the cruise control module to confirm its proper operation. Should you still encounter difficulties, consulting a qualified mechanic or dealership is advisable for further assistance. By following this structured diagnostic approach, you can efficiently identify and address the problem with your cruise control system.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz Sprinter 2500?

When troubleshooting the cruise control system in a 2021 Mercedes-Benz Sprinter 2500, 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 disrupt 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 cause the cruise control to disengage unexpectedly, particularly when the brake pedal is pressed, creating a frustrating driving experience. Another potential issue is a malfunctioning throttle actuator, which can hinder communication between the cruise control system and the engine, resulting in operational failures. Furthermore, a defective cruise control module may prevent the system from receiving the necessary signals to function correctly. Lastly, electrical problems such as wiring issues or blown fuses can also interfere with the cruise control's performance. By identifying and addressing these common issues, you can effectively diagnose and repair the cruise control system, restoring its functionality and enhancing your driving experience.

How urgent is it to address the malfunctioning cruise control in a 2021 Mercedes-Benz Sprinter 2500?

When it comes to a malfunctioning cruise control system in your 2021 Mercedes-Benz Sprinter 2500, 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 significant safety risks not only to the driver but also to other road users. Ignoring these symptoms can result in more severe problems down the line, potentially leading to costly repairs that could have been avoided with prompt attention. Moreover, cruise control is designed to enhance your driving experience by reducing fatigue during long trips; therefore, resolving any malfunctions quickly can restore comfort and convenience to your journeys. In summary, prioritizing the repair of your cruise control system is essential for maintaining safety, preventing further damage, and ensuring an enjoyable driving experience.

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