Same thing happened with me when I picked up my M3 in Marina Del Rey a few weeks ago. I received a text informing me of my tentative pick-up day/time. That was it, no e-mail, not even a word from a Delivery Advisor (I'm still not sure if I was even assigned one lol). A day before this "tentative" date arrived, I called Marina Del Rey directly and asked if they could confirm my appointment and they said "Yup, you're in our system, see you tomorrow." So it all ended up working out.