Remote Keyless Entry (RKE) Power Liftgate
WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
The RKE feature provides a power liftgate open/close function independently of key position. The power liftgate button must be pressed twice within 3 seconds for the power liftgate to open or close.