The Mercedes-Benz Sprinter has been sold under many nameplates: Dodge, MB, Freightliner, etc. It was the first of the modern eurovans sold in the US. Perhaps because of the head start it is the dominant high-roof camper conversion platform in the U.S., both DIY and commercial Class B.
The “super high roof” and (discontinued?) “mega roof” appear to have fiberglass roofs, though panels are reported to mount to them without issue.2)
Issues moved to the van issues page with other van types.
The walls are curved in prominently near the top. This can limit space and make building the walls difficult.