Twice I have lost my entire LED screen and remote doesn't work when cold / hot. on 2011 BMW 750Li

BMW said I left the car in the "on" mode too much. The screen stayed off for a week, then came back on just after I made apt with service. Changing batteries in remote doesn't help. When too hot or too cold outside the remote doesn't work at all, anyone else have this problem?

Asked by for the 2011 BMW 750Li