I was there in November and the museum is a must. I also rented a 911 GTS for an hour from Porsche Drive at the museum. Cost was 125 Euros and the autobahn is a few minutes away. You get it for 1 hour and up to 100 km. I had it up to 225km\h (140 mph). When I returned it, they said no one had ever put on over 100 km in an hour, I put on 108!
You can rent any P-car model for 1 hour to a week:
https://drive.porsche.com/en/start.html
