We offer extensive vehicle options, 24 hour pick up and return, convenient locations and to ensure you receive the perfect vehicle for your needs, we also offer a variety of optional add-ons. You can include extras such as baby and child seats, Sat Nav, additional driver insurance and unlimited mileage. Enhance your car rental Giessen experience with these great deals. When booking your Sixt car hire Giessen, please be aware that we offer you the choice of vehicle categories, but we cannot guarantee you a specific vehicle model. Make the most of your time in Germany with the convenience and comfort of a car rental from Sixt.