Unlocking and opening the trunk lid/tailgate
WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.
The request to open the trunk lid/tailgate of the vehicle is triggered by pressing the trunk lid/tailgate outside switch. When the vehicle is locked, this leads to a search for an identifier via the rear antennas. The request for the search is sent by the power module via CAN to the CAS and from there to the Comfort Access control module. This runs the search for the identifier.