When you order a Sprinter, you don't have an assigned place in the queue that remains constant. Mercedes builds the vans in batches that have mostly common features. They wait until they have enough vans of similar permutations (option choice possibilities), and then they build that batch because most of the options are the same and they don't have to alter the sequence of construction. Some orders may come in within a few months. It has been 21 months since I ordered mine (with almost every option available) and it still hasn't arrived in South Carolina yet.
Comparing when you and someone else placed their order, when the other person received their order, etc., is not going to help you estimate when your own van is coming in.