Unlocking the trunk lid using the key button

There is a button on the key for unlocking only the trunk lid.
16w17 - SPA - Unlock/open tailgate with remote key button
Press the P5-1646-x90-Remote key icon for trunk opening/closing button on the key.

The trunk lid will be unlocked but remain closed.

The side doors remain locked and armed. The lock and alarm indicator on the dashboard will go out to indicate that the vehicle is no longer fully locked.

The trunk lid can be opened by grasping the rubberized button under the lower edge of the trunk lid.

If the trunk lid is not opened within 2 minutes, it will be relocked and the alarm armed.

Power trunk release*

Press and hold the key's P5-1646-x90-Remote key icon for trunk opening/closing button for a few seconds.
The trunk lid will open mechanically while the doors remain locked and armed.
  1. * Option/accessory.