External Controls - Overview
WARNING: This page is about a different car, the 2020 Lincoln Nautilus. However, it is still accessible from the selected car via links, so may be relevant.
The shift by wire system uses a push button GSM to interface with the PCM to select gear positions.
The steering wheel has paddle switches which allow the driver to manually shift the transmission when S is selected on the GSM.
The shift by wire system also includes a brake shift interlock that will not allow the transmission to shift out of P unless the brake pedal is applied.