2021 Mercedes-Benz Sprinter 1500 Cruise Control Isn't Working

Fixing Cruise Control Issues in the 2021 Mercedes-Benz Sprinter 1500

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Reviewed by
Aisha
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 1500 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 1500 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-functional cruise control in a 2021 Mercedes-Benz Sprinter 1500?

When faced with a non-functional cruise control in your 2021 Mercedes-Benz Sprinter 1500, start your troubleshooting by checking the cruise control fuse, as a blown or damaged fuse is often the simplest issue to resolve. Next, inspect the cruise control switch located on the steering wheel to ensure it is operational; a malfunctioning switch can prevent the system from engaging. Following this, verify the vehicle speed sensor, which is crucial for the cruise control to function correctly, as it monitors the speed of the vehicle. Additionally, examine the brake pedal switch, as a stuck or faulty switch can inadvertently disable the cruise control system. Finally, utilize the vehicle's onboard diagnostic system to check for any error codes that may provide insight into underlying issues affecting the cruise control. By systematically addressing these components, you can effectively diagnose and potentially resolve the cruise control problem in your Sprinter.

What are the common problems that could cause the cruise control to stop working in a 2021 Mercedes-Benz Sprinter 1500?

When troubleshooting the cruise control system in a 2021 Mercedes-Benz Sprinter 1500, it's essential to consider several common issues that may be at play. A faulty speed sensor is often the culprit, as it plays a critical role in relaying the vehicle's speed to the cruise control system; if it malfunctions, the system may fail to engage or maintain the desired speed. Additionally, the brake light switch can cause disruptions; since the cruise control is designed to deactivate when the brakes are applied, any issues with this switch can lead to unexpected behavior. Another area to inspect is the throttle actuator, which controls the engine's throttle opening; if it is not functioning correctly, the cruise control may struggle to maintain speed. Furthermore, a defective cruise control module can prevent the system from operating as intended, necessitating repair or replacement. Lastly, electrical problems, including faulty wiring or blown fuses, can also hinder the cruise control's performance. By systematically checking these components, DIYers can effectively diagnose and potentially resolve the issues affecting their vehicle's cruise control system.

How urgent is it to address the non-functioning cruise control in a 2021 Mercedes-Benz Sprinter 1500?

When it comes to the non-functioning cruise control in a 2021 Mercedes-Benz Sprinter 1500, the urgency of addressing this issue cannot be overstated. While it may not seem like an immediate emergency, neglecting this problem can lead to significant safety risks and potential damage to the vehicle's electronic systems. Cruise control is designed to enhance driving comfort and efficiency, particularly on long journeys, and its failure may indicate deeper issues within the vehicle's sensors or electronic components. By postponing repairs, drivers may find themselves facing increased fatigue during extended trips, as they will need to manually maintain speed, which can also lead to erratic driving patterns. Moreover, a malfunctioning cruise control system can compromise the vehicle's overall performance, potentially affecting other critical functions. Therefore, it is advisable for DIY enthusiasts to investigate and resolve the issue promptly, ensuring not only the functionality of the cruise control but also the safety and reliability of the vehicle on the road. Taking action sooner rather than later can prevent further complications and enhance the driving experience.

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2021 Mercedes-Benz Sprinter 1500 Cruise Control Issues