To assist a driver with requesting navigation data via a head unit of a vehicle, partial user input provided to the head unit is received via a short-range communication link and suggested input corresponding to the partial user input is generated. The partial user input includes a sequence of alphanumeric characters. The suggested input includes the sequence of alphanumeric characters and one or more additional characters and corresponds to a set of one or more geographic locations. The suggested input is provided to the head unit via the short-range communication link.