My bad - poorly written: I meant the meetings between Elon and Diess re VW acquiring Tesla at that time might sound far fetched. Tesla was on the brink of disaster if Elon was in negotiations. This wasn't widely reported at the time, and I can't find out where I read about it. This means that Diess must have seen a good deal of Tesla tech at the time. May have been at the same time Apple's Tim Cook refused to meet w/ Elon. We'll probably find out all these details in one of the 2+ upcoming books on Tesla.
Of course Guillen's intervention was brilliant, so much so that they used that same approach for SpaceX ramp up.