I'm curious as well. It's very nice that the Mercedes integration is in theory just an app, but like you I don't have a house that's compatible with Nest. It w

I'm curious as well. It's very nice that the Mercedes integration is in theory just an app, but like you I don't have a house that's compatible with Nest. It would be really nice though if there was an open protocol for this stuff. I'd like my car/phone to tell my house that I'm on my way, even if I'm not using anything Nest-like. Sadly, a sense of realism tells me open protocols aren't really what any manufacturers have in mind. So far it's all tightly integrated walled gardens.