A method comprising: receiving a request at a remote rental system (106, 5202) from a position tracking-enabled mobile device (102, 5250) of a user to use a vehicle, the request created by a mobile application on the position tracking-enabled mobile device and comprising a request by the user to use the vehicle at the time of the request; in response to the received request, the remote rental system (i) determining that the user is authorized to use the vehicle, (ii) wirelessly communicating a cellular command to wake up equipment installed in the vehicle if the user is authorized, wherein the equipment obtains a GPS position for the vehicle from a GPS system of the equipment, (iii) receiving the GPS position for the vehicle to determine a physical location for the vehicle, (iv) determining a physical location of the position tracking-enabled mobile device, and (v) verifying a physical presence of the user near the vehicle based a comparison between the determined physical location for the position tracking-enabled mobile device and the determined physical location for the vehicle; and in response to the user authorization determining step and the verifying step, the remote rental system wirelessly communicating with the woken-up equipment to cause the woken-up equipment to provide an enable signal to a smart key emulator included in the equipment, wherein the enabled smart key emulator emulates a smart key for the vehicle by wirelessly communicating with a smart key presence sensor resident in the vehicle to (i) emulate a presence of a smart key in proximity to the smart key presence sensor and (ii) permit the user to keylessly start the vehicle without requiring the user to possess a smart key for the vehicle. receiving a request at a remote rental system (106, 5202) from a position tracking-enabled mobile device (102, 5250) of a user to use a vehicle, the request created by a mobile application on the position tracking-enabled mobile device and comprising a request by the user to use the vehicle at the time of the request; in response to the received request, the remote rental system (i) determining that the user is authorized to use the vehicle, (ii) wirelessly communicating a cellular command to wake up equipment installed in the vehicle if the user is authorized, wherein the equipment obtains a GPS position for the vehicle from a GPS system of the equipment, (iii) receiving the GPS position for the vehicle to determine a physical location for the vehicle, (iv) determining a physical location of the position tracking-enabled mobile device, and (v) verifying a physical presence of the user near the vehicle based a comparison between the determined physical location for the position tracking-enabled mobile device and the determined physical location for the vehicle; and in response to the user authorization determining step and the verifying step, the remote rental system wirelessly communicating with the woken-up equipment to cause the woken-up equipment to provide an enable signal to a smart key emulator included in the equipment, wherein the enabled smart key emulator emulates a smart key for the vehicle by wirelessly communicating with a smart key presence sensor resident in the vehicle to (i) emulate a presence of a smart key in proximity to the smart key presence sensor and (ii) permit the user to keylessly start the vehicle without requiring the user to possess a smart key for the vehicle.