Tailgate/tailgate lock

The operating points (rear lid button, passenger compartment, outer tailgate pushbutton) are used for electric unlocking of the rear lid lock (hotel setting not engaged). The Body Domain Controller (BDC) is the master control unit. This means that the Body Domain Controller (BDC) issues the release for unlocking the tailgate lock. The Body Domain Controller (BDC) activates the direct current motor of the release drive in the tailgate lock, thereby triggering the tailgate lock to unlock.

The request to open the boot lid/tailgate of the vehicle is triggered by pressing the boot lid/tailgate pushbutton. If the vehicle is locked, a search for an ID transmitter via the exterior aerials then takes place. When the luggage compartment is closed, authentication is requested from the ID transmitter belonging to the vehicle via the luggage compartment antennas. If an ID transmitter in the luggage compartment replies and no other ID transmitter outside the luggage compartment replies, the boot lid/tailgate is opened again. This prevents an ID transmitter from being accidentally locked in the vehicle. If another ID transmitter is found outside the luggage compartment, the tailgate remains closed. The ID transmitter that is in the luggage compartment is blocked as a possible transmitter when the vehicle is next unlocked.

In the future, the tailgate can be closed and secured with an additional operating point in the tailgate:

Courtesy of BMW OF NORTH AMERICA, INC.