Enterprise Car Rental
To rent a vehicle on base from the Enterprise Rent-a-Car, you need a valid USAREUR driver's license. Businesses outside the installation require that you have a valid U.S. license and an international driver's permit. This official document certifies the validity of your U.S. license in ten different languages.
You will need this document when traveling across borders in Europe whether renting a car or not, so it is a good idea to get that document as soon as you can. Contact the 52nd Security Forces Squadron Driver's Testing office about both the USAREUR license and how to obtain an international driver's permit.