Exactly like your, nothing working on my app either. I went out and started the car, moved it a few yards and the app is working again. I managed to alter all temperatures charging programs etc.The Mercedes Me app no longer allows configuration of pre-entry climate control and charging programs. The ability to set temperature by zone has been added this week.
I can set pre-entry on and off in the "once" mode, but the zone temperature setting that has appeared now doesn't work, and weekly profile doesn't work. In both cases I get the error "transmission of the temperature update may have failed."
Also I can no longer change the charging program from the app. I get the the error "update to charging configuration may have failed".
The ability to set the pre-entry climate temperature and the charging program from the app was working just fine last week.
Anyone else seeing the same?