A vehicular navigation system is provided that includes a vehicular wireless communication system that comprises a global-positioning system receiver in a vehicle, the global-positioning system receiver operable to receive data indicative of the geographic position of the vehicle from satellites external to the vehicle. The vehicular wireless communication system includes a wireless communication link between a transceiver in the vehicle and a transceiver at a site remote from the vehicle whereby wireless communication can exist between the vehicular transceiver and the remote transceiver. The vehicular wireless communication system is responsive to the request by downloading to the vehicle turn-by-turn directions generally from the current location to the destination, the turn-by-turn directions being derived from a database and a display in the vehicle, preferably at the interior rearview mirror assembly, displaying turn-by-turn instructions to the driver of the vehicle.