Id think the dealer should change the MU out regardless. mine said, "whenever you are ready I will order the part", they are not going to do any testing at all I just said, I experienced this unsafe issue.. my car didnt respond in traffic and and almost caused an accident.. and they will just swap it out as the campaign suggests. or ID hope.
Schwung, next time you take a road trip go see a vw dealer and see if they can at least order the part for you or get the ball rolling, maybe they can get the claim started and have your local dealer do the install when the part arrives.
or you can bribe your servicewriter