Here's what I recommend:
1. Check your owner's manual: The most reliable source of information will be your Sprinter's owner's manual. It will have detailed diagrams and instructions specific to your vehicle.
2. Look online: Search for "Dodge Sprinter 3500 fuel filter location" along with your specific year and engine type. There are many forums and online resources that can provide helpful information.
3. Contact a mechanic: If you're still unsure, don't hesitate to contact a qualified mechanic. They will be able to identify the fuel filter location and assist with any questions you may have.
Remember: Working with fuel systems can be dangerous. If you're not comfortable with the task, it's best to leave it to a professional.