Don't know about the alarm system, but the heated mirrors can be turned on and by a button that looks like a rectangle with three curvy arrows pointed up through the rectangle. The same button turns on the rear window defroster and is located on the climate control panel. I believe it's on the mode control dial.
DTE= Distance to Empty.
DISTANCE to empty...I had a bad case of stupid! (I put "date" till empty)....Thank you for clarifying that!