I'm not sure if it's possible without plugging a computer in. I do know that when my car arrived back at the Australian Launch it had the auto adjust setting displayed in the car and in Mercedes Me, but it didn't actually work. 3 weeks or so later the setting disappeared in an OTA update to the car, and the next day it disappeared from Mercedes Me. I've heard of people have success fixing their settings by a profile reset, but that's pretty annoying to do.