Unlocking the trunk lid using the key
The key can be used to unlock only the trunk lid.
Press and hold the key's 
button (about 1.5 seconds).
button (about 1.5 seconds).The trunk lid will open mechanically while the side doors will 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.
If the trunk lid is not opened within 2 minutes, it will be relocked and the alarm armed.