Mercedes-Benz Sprinter 3500 Cruise Control Isn't Working

Common Causes of Cruise Control Malfunctions in Your Mercedes-Benz Sprinter 3500 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
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25% chance it's the
Throttle
0%
20% chance it's
Something else
The most common reasons a Mercedes-Benz Sprinter 3500 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 Mercedes-Benz Sprinter 3500 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.

Troubleshooting Cruise Control Issues in a Mercedes-Benz Sprinter 3500

When troubleshooting cruise control issues in your Mercedes-Benz Sprinter 3500, it's essential to adopt a methodical diagnostic approach. Start by checking the control module, sensor, and throttle, as these components are often the root of the problem. If these initial checks do not reveal any issues, proceed to inspect the vacuum actuator and hoses, as leaks or blockages here can disrupt the cruise control functionality. Next, examine the transmission speed sensors and fuses, since malfunctions in these areas can also hinder the system's performance. It's also wise to stay informed about any recalls that may affect your vehicle, particularly those related to wheel sensors, which could impact cruise control operation. If you have retrofitted the cruise control system, ensure it is activated correctly using the diagnostic system to facilitate proper troubleshooting. Additionally, familiarize yourself with the Distrontic system, as understanding its operation can enhance your ability to maintain the desired speed. Finally, if you encounter a warning message indicating that the cruise control is inoperative, use this as a cue to revisit your diagnostic steps, as it may point to common issues that can be resolved with careful attention. By following this structured approach, you can effectively diagnose and address cruise control problems in your Sprinter 3500, ensuring a smoother driving experience.

What Could Cause the Cruise Control to Malfunction in a Mercedes-Benz Sprinter 3500?

When troubleshooting cruise control issues in a Mercedes-Benz Sprinter 3500, it's crucial to identify the common problems that may be at play. A malfunctioning control module, sensor, or switch is often the primary culprit, as these components are integral to the cruise control system's operation. Additionally, problems with throttle actuation can hinder the system's ability to maintain speed effectively. It's also vital to inspect the brake pedal switch, as a defective switch can inadvertently disable the cruise control feature. Other potential issues include a blown fuse or a faulty speed sensor, both of which can disrupt the system's functionality. In some cases, the cruise control malfunction may be associated with the Electronic Stability Program (ESP) or wheel sensors, which can impact performance. Fortunately, many of these issues can be addressed with straightforward solutions, such as reattaching a loose sensor or performing a reset by restarting the vehicle. By understanding these common problems, you can take the necessary steps to diagnose and resolve cruise control malfunctions in your Sprinter 3500, leading to a more enjoyable driving experience.

Why is the Cruise Control Not Working in a Mercedes-Benz Sprinter 3500?

When the cruise control in your Mercedes-Benz Sprinter 3500 is not functioning, it is crucial to address the issue without delay. Ignoring symptoms such as the system failing to engage or disengaging unexpectedly can lead to dangerous driving situations, particularly on highways where maintaining a steady speed is essential for safety. A faulty cruise control switch, for instance, may seem like a minor inconvenience, but it can significantly impact your ability to control the vehicle effectively. Additionally, problems with the speed sensor or brake light switch can not only disrupt the cruise control function but also pose risks if they affect your vehicle's overall responsiveness. Electrical faults, such as blown fuses or wiring issues, can lead to more severe complications if left unchecked, potentially resulting in costly repairs. Therefore, if you notice any signs of malfunction, it is advisable to conduct a thorough inspection or consult a qualified mechanic to diagnose the problem promptly, ensuring both your safety and the optimal performance of your vehicle.

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