[polerad]

Thank you Herr @ProfessorCook !
For folks who have done the 12V disconnect to good results, is this what you did? Or did you disconnect at the neg terminal - red ellipse #7 ?
@kkonstan I think you've done this?

I'm weighing the pros/cons for waiting out 1.5 weeks to take the car in, vs trying this out and hopefully getting functionality back for the intervening 2 weekends and my commute. Also not potentially electrocuting myself is a factor given my autoEMP tendencies.

 

[polerad]

Good news, bad news:

Good news - disconnecting the negative terminal is totally easy. I managed to do it just now and not electrocute myself.
Just get the 4 push button rivets out to take off the top panel (really could do it with 2 out and lift the plastic on the appropriate side). Then loosen the fastening nut on the negative terminal and lift it off - do it in one motion so it doesn't contact/recontact a bunch as I'm guessing that's bad. Then when ready do the reverse to reconnect everything.

Bad news - My connectivity is still completely broken. With the negative terminal disconnected the car was entirely dead and unresponsive. So that part worked. And after waiting in that state 5 min, when I reconnected everything started up again.... but no internet. My time/date settings were all off (it thought it was in a different time zone 2 days back!) and I'm guessing some other stuff is off too.

Ah well.... 1.5 weeks to go until my service appt....