Installed the Avin 4 over this weekend into my Nav non-DSP e53. Running the extension cables was a royal PITA.

Basic radio functions are working.

I have a few questions:
1. The wireless car play is plugged in, and the Avin asks if I want to connect on power up, but it doesn't seem to connect. Is there something I have to do?

2. What do I have to do to get the Resler iBus to work? It just shows engine RPM.

3. I bought (and ran) the GPS extension cable. Where does that hook into in the back?

4. What is the WiFi antenna for?

Thanks!