A system and method for performing an operation at a vehicle is disclosed. The system includes a first acoustic transceiver that transmits and receives inaudible acoustic signals and a second acoustic transceiver that transmits and receives inaudible acoustic signals. The second acoustic transceiver is stationary with respect to the vehicle. A processor receive an inaudible acoustic signal transmitted between the first acoustic transceiver and the second acoustic transceiver, determines a location of the first acoustic transceiver with respect to the vehicle from the received signal, and performs an operation at the vehicle based on the location of the first acoustic transceiver with respect to the vehicle.