Power difference between ignition on and ignition off
I've been wondering if it was worth switching the ignition off when I'm sitting in my etron for an extended period of time, since you have to turn it off and then back on with your foot off the brake, and then the steering wheel audio controls don't work. Using an OBD2 scanner, I was able to see that the power consumption is nearly 3x higher with the ignition on than with it off. Off = 400W, On = 1140W with the AC on. Granted that this would save less than 1% of the battery over the course of an hour, but I like that things that I'm not using are powered off, like the power steering.