I have a few days in Germany next week and am looking for any tips or advice from you all. Here's my current plan:

- Wednesday: arrive in Munich in the evening

- Thursday: BMW Welt in the morning, then grabbing a rental car (BMW 320i from Avis I think) and driving to Switzerland via at least a little unrestricted autobahn and along the border of Lichtenstein (one more country to cross off the list). I think we'll probably stay in Lucerne that evening

- Friday: drive to Stuttgart (with a stop at Hohenzollern castle)

- Saturday: Porsche museum in the morning (maybe Mercedes in the afternoon?) and return car by 4pm


I emailed Porsche about getting a factory tour on Saturday but since it's the weekend I think that's unlikely. What am I missing... what would you guys do? Wrong part of the country (and time of year?) to get to the 'Ring so that will have to wait. Any help appreciated!