Sixt aims to provide customers with all the add-ons they need with their car hire to make their journey as smooth as possible. Once you have selected your vehicle, you have the option of including several useful extras to your car hire. Those short of time can make use of the pick up full, return low fuel option and have a full tank of fuel with their vehicle with no obligation to refill before returning the car. Special car hire deals are available for under 25s and children's booster seats, roof racks and Sat Navs are also available at the point of booking. Please be advised we cannot guarantee the availability of a specific model of car but we can guarantee a reservation of the car category selected.