A method for inputting position data into a navigation device of a vehicle, includes the steps: —displaying (10) positions on a graphical output unit of a mobile radio terminal device; —marking (12) one of the displayed positions on the output unit by a mark; —displaying (14) a graphical representation of a symbol for a vehicle by the output unit, to which vehicle the mobile radio terminal device makes vehicle-specific communication link data available; —shifting (16) the mark to the symbol of the vehicle or the symbol of the vehicle to the mark on the output unit; and —transmitting (18) position data identifying the marked position to the navigation device of the vehicle.