Hi all, a week in and I've had more issues than I did on my last car in 8 years. I'm perseververing tho. When I lock the car there is a high pitched tone coming from somewhere, very difficult to locate. I have had issues with battery drainage and this is the first time I've noticed this tone. It stops when I open the back doors.I have no interior lights on or anything really obvious that I can see. Any help for this really needy newbie would be greatly appreciated.