If you have never driven a car in Europe there are some things you should be aware of ahead of time.
Today, I will let J share how he prepared to drive in Europe.
If you plan to drive in Europe you will need to get an international driver license. For the most part, this is required for renting a car. If not, it could cost you more and delay getting your rental. It is also a requirement to have one in Austria as you could be fined for not having one, even though Germany may not require it.
Next, obtain the rental contract in your language in advance and read it carefully. Also read up on the rules of the road for the countries you plan to visit. The signs are different than in the US.
Another huge mistake some people make is not having the Vignette Austria, which is a toll sticker needed on your car window when driving in Austria. You must purchase one and have it on your window BEFORE you drive on Austria main roads (8.70 Euros). Otherwise they may pull you over and be fined up to 300 Euros. This is a common complaint that is searchable on the internet.