I just installed a 8400nex and enabled the soft bypass, but I cannot get Android Auto to connect......it complains that I need to stop the car and engage the brake.

I thought using the soft bypass trick would mean I don't have to use the parking brake wire on the 8400, but apparently not?  

How have others gotten Android Auto to work?

Mike

Well, I answered my own question: I pulled out the stereo and connected the e brake wire, so yes, you MUST have the parking brake wire connected to the e brake switch (or other on/off switch) for Android Auto to work.   Just using the "soft bypass" trick is not enough.