Here is my planned route:
Fly into Munich on 29-Sept.
Sunday in Munich.
Monday, Pickup Car, Factory Tour northeast of Munich.
Tuesday, Drive to Berchtesgaden (166km) http://goo.gl/maps/nt9i
Wednesday, Drive to Fussen (277km) http://goo.gl/maps/mFcM
Thursday, Drive to Karksruhe (423km) http://goo.gl/maps/KrZE
Friday, Drive to Berlin/Potsdam (Final path not yet decided could be 600+km)
Saturday, in Berlin/Potsdam
Sunday, Travel to Munich (~564km) http://goo.gl/maps/A5dpp
Monday, Drop off Car, Fly out.
Should be a little over 2000 km (~1250 miles) by the time the trip is over.