Yes, the English garden is full of **** people. Europeans are not anything like Americans when it comes to modesty. They don't always see ****** and sex as the same thing. Very refreshing.
The Autobahn is the best driving experience ever. As long as you pick your times and places. otherwise it's just like America, traffic. If you are anywhere near Munich in the summer or Oktoberfest it can be like LA, or the capital beltway.
Most of the time, it's best not to have a car. Public transport is dirt cheap. Get an ISAR card at the main train station (Hauptnahnhof) for about $30-$50 a week! It gives you a huge area to travel in if you get all 12 zones. Imagine what a tank of gas will cost at about $2.00 per liter!
I would drive north towards Leipzig for a thrill. The A9 past the airport. The road from Munich to Ulm to Stuttgart is great too, at night. Ulm has an unbelievable Cathedral.