FWIW, to maximize range, set your departure time to the ACTUAL planned time...the car will then start to precondition the batteries as much as 3.5-hours before on its own. If you set your departure time 3-hours early...things will have cooled back down again somewhat, and you will not be maximizing your range. And, if you set it to precondition the cabin, it will have stopped way before your actual departure time as it only runs for about 20-minutes just before your scheduled departure (and beyond your scheduled departure, if you're late in starting). The two biggest power eaters are high speeds, and lots of cabin heating. The headlights probably come in third as a load, especially if you are running the high beams which, as delivered, are not LED bulbs, but halogen. Most people can achieve at least 4-miles/KW, or 250W/mile. Your high beams are 100W, which would make your power consumption 350W, and then throw cabin heating and fan at probably more than 200, maybe lots more, and you get the idea.
2011 535i x-drive GT, 2014 i3 BEV