A navigation system for a vehicle includes a control and a global positioning system. The control may receive a user input and may download directional information from an external service provider to the control in response to the user input and an initial geographic position of the vehicle. The directional information may comprise at least two instructions coded or associated with or linked to a respective geographic location. The control may provide an output corresponding to each of the instructions in response to a current actual geographic position of the vehicle. The control may provide each instruction only when the then current actual geographic position of the vehicle at least generally corresponds to the particular geographic location associated with the instruction. Driver instructions may be provided audibly and/or may be displayed on a display screen visible to the driver, preferably at an interior mirror assembly of the vehicle.