The earliest you can get your ED confirmed is 6 months. Some dealers will agree on a deal outside of that window (my first ED, we agreed 8 mo out), but BMW does not confirm greater than 6 months.
Just a thought on Octoberfest...enjoy the festivities..then pick up the car, maybe?
WARNING: Author not responsible for the readers failure to recognize sarcasm.
2014 BMW i3
2013 BMW 550
2009 BMW 335