is a sprinter van a class b

https://kilo-wiki.win/index.php/Luxury_Sprinter_Van_vs_Class_B_RV:_Which_One_Fits_Your_Travel_Style%3F

A sprinter van is actually a common example of a Class B RV, which is basically a converted cargo van with living amenities. It's not a separate category itself, but rather a specific model—the Mercedes-Benz Sprinter—that gets built out into a camper van. So when someone says they have a sprinter van, they're usually talking about a Class B motorhome.