The U.S. JGC diesel will have SCR. The 2012 Jetta is the only clean diesel in the US that doesn't have it. The 2012 Passat has it and is about 230 lbs heavier, yet is epa rated about 1 mpg higher.
SCR is no big deal, the fluid has an ISO spec. (22241) the fluid is common to all manufacturers and is readily available at all parts stores, truck stops and places like walmart. The annual cost (15k per year) on a 3.0L CRD is about $35, 7 gallons at about $5 a gallon, this has been my personal experience in over 30k miles.
Filling the tank is about as complicated as adding washer fluid.