I just had an issue with BMW Assist that I want to post, with the hope that others can search and get some insight. I'd searched before trying to fix the problem, but didn't see anything that was helpful for this type of issue.
I'd made a call using the SOS button. After I was through talking with the representative, she told me that she'd "disconnect the call for [me] now." Well, she went away, but the data screen on the display stayed on (showing the information about the BMW Assist session), and the green LED next to the SOS button continued to blink.
This lasted for about five minutes. When I turned off the car and exited, the problem persisted. I waited a big longer, which did not yield any results. (The screen stayed on, the LED continued to blink.) I finally called the BMW Assist number from my cell phone, and told them that my vehicle appeared to be "stuck" on their service.
The representative was very helpful. She told me she would force a manual disconnect. This solved the issue. I was please, as I was afraid I was going to have to pull a fuse or something.
So, if there are issues with the BMW Assist, the first call should be---BMW Assist.
Joel