It would also be a good idea to take your Sprinter/Via to Mother Benz and have them do a couple things: register it in their database as the new owner; pull the maintenance/service records; make certain the oil used meets MB BEVO spec. 229.52; fuel filter has been changed on schedule (not a DIY job); airbags (both) replaced under recall; and, all software updates for the emission system have been applied. And, any other recalls on the emission system have been accomplished.
Also, contact WBO with your VIN and chassis information and verify that any recalls have been completed. Particularly, on some models theynusedmthe wrong material in the LP hoses. They will leak and crap up the regulator.
Sprinter-source forum is also a good resource.