I had a parasitic draw on my brand new 2017 Sport. I found that the issue was being caused by an ACM module and it needed an update. I had the same thing happen about 35K miles later, and found that another update was needed due to the eject button from another module was causing a draw/drain. Now at 55K miles I have another drain. I'm hoping to get a full update again, but that seems to be the common cause of the draw(s).