I live in Germany, slightly out of the way of Munich driving from Frankfurt.
May will be really good.
Next week is supposed to have some rain Today was beautiful and next weekend will be beautiful.
Not sure where you are staying, but I'd push the alps later in the week to take in some of that beauty.
Porche, Unimog, Mercedes Benz, BMW and everyone else have interesting museums in their headquarters areas.
if you are very lucky you could get a tour at Blaser if you call when you get in. Heym and Krieghoff could probably do it as long as you call early.
The Frankonia in Wurzburg suburbs is the flagship store. The smaller stores are ok. The inner city stores kind of suck. Those are the better chain gunshops in Germany,k kind of like a sportsmanswarehouse but only hunting.
There are about 20 other stores.
The one in Darmstadt is fine if you can get to it.
The Stuttgart store is nice, and there is a ton of German trachten stores around it.
If you go to Innsbruck Austria Swarovski is on the far east side of town. There are a couple of good hunting stores in Innsbruck. I think you can do an optics factory tour. Most of their tours are centered around their crystal world center. Interesting if you have a woman with you, and there is a Swarovski optic pro shop in the world of Swarovski crystal center.
https://routetogermany.com/drivingingermany/autobahn. If you have not been here before you need to take a look at this information on driving.
About 30-70% of the Autobahn has no speed limit. But some of it does, and some times it is only 60 or 80 during construction or if there is water, 100, or a thousand other reasons. Most of the time it is 130 if it isn't unlimited.
2 lane Authobahns are mostly 130, rural 3 lane autobahns are mostly unlimited.