Solera2012,
Send me a PM with your VIN# and a valid email address and I will download your Sprinter's "DataCard" and forward it to your email.
The DataCard includes the build date, all of the options, absolutely everything that went into the building of your Cab/Chassis at the Sprinter Factory in Dusseldorf.
Include a valid email address as the PM server software does not like .PDF attachments.
Knowing the build date will definitely get you the year model, which also could possibly be gleaned from your VIN # as I believe one of the characters/digits is the year model.
There aren't many differences between the 2011 and 2012 NAFTA Models (I've had both) AFAIK.
Are you having your services done at an authorized Mercedes Benz Sprinter dealer?
If so, they will take care of any upgrades that are needed.
If you are having your Sprinter serviced at an RV dealer, they have no ability to perform these kinds of upgrades as they have no access to the MB SDS Diagnostics system that is required.
Roger