I tried camping in my M3 a few weeks ago and yeah, the climate settings/getting the screen to turn off were a nightmare. I had just assumed camping mode would do, you know, reasonable stuff. But no. Everything else about it was great, though! Just took my twin memory foam mattress topper off my bed and put it in the back and slept great!
I ended up going the manual route - turning on climate control (which I could then control the temperature of with my phone from the back), dimming the screen and putting a shirt over it, and then manually turning sentry mode off and back on every time I had to get out of the car. Which brings up another pet peeve of mine: why the alarm goes off even when the car knows someone's in the car, in the seat next to the door being opened. I guess it could be a heavy backpack or something for all it knows, but it's BEYOND annoying to have the alarm go off when you're in the car, especially in the middle of the night in an RV park...
I ended up going the manual route - turning on climate control (which I could then control the temperature of with my phone from the back), dimming the screen and putting a shirt over it, and then manually turning sentry mode off and back on every time I had to get out of the car. Which brings up another pet peeve of mine: why the alarm goes off even when the car knows someone's in the car, in the seat next to the door being opened. I guess it could be a heavy backpack or something for all it knows, but it's BEYOND annoying to have the alarm go off when you're in the car, especially in the middle of the night in an RV park...