I have not done an ED before but have done a lot of work travel to Europe. Does your day 1 include the flight from California to Munich? The reason I ask is that you pretty much lose a day traveling with the travel time and time zone change. Also, if you can sleep most of the flight then you could arrive prepared to go. Though I will say that even when I get sleep on the trip, the first day is a bit of a blur with adjusting, etc. I guess in short, you might want to bake in a day on the front end so you are fresh when you pick up your car and do the tour.
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