Re: Height of 2011 Sprinter High Roof
My 2012 RB sprinter has one of the those factory rubber radio antennas above the cab that adds a couple of inches. Maybe they have included that as part of the vehicle height spec to indicate required minimum clearance? Also your van is not unladen (all that build out casework weight), and may not have the some optional suspension or tires that could increase the height -if the specs were intended to indicate maximum height.
1991 VW Westy (N8IV) aka Vanna, of Ashland, OR
2012 Sprinter RB SMB PT (ALCES2) aka Moose, chill'n in Anchorage, AK