2015 mustamg eccoboost
So yesterday while driving I tried to roll down my window and it only went half way, will not go farther down. Once home I noticed when I shut the door the window was in full up position. It didn't go down the 1/4 " then seal up bur was just full up from when I pushed the door closed. Didn't think anything of it and thought I fix it the next day. Well got up for work to dead car battery, didn't have time to jump atm. But what could be the issues ???

 

to fix the window, use the reset procedure in the owner's manual -- I think it is basically roll the window all the way up and hold the button for a few seconds; roll all the way down and hold button for a few seconds

I doubt the window issue killed the battery but I guess it is possible