I have a 2017, and I have found that with the driver door open, I hit the lock button either on the remote, or the one on the dash. I then manually pull up on the lock post on the driver door, and close it. The door remains unlocked, but the trunk does stay locked. (Of course the horn alarm will sound if the door is subsequently opened, without the remote unlock being depressed)
Hope this works for your model.
Last edited by Loachdvr; 05-31-2018 at 05:53 PM.