Hooked up iPhone to MEDIA connector, worked OK for about 20 sec. Then quit. Finally figured when starting car, Bluetooth hooks up to phone & kills MEDIA connection. Only way to re-initialize MEDIA conn is unhook, rehook. Can't find any to re-initialize from RCD-510 touchscreen. Only option looks to be wait for Bluetooth, THEN hookup to MEDIA.
Could just use Bluetooth for everything, but phone gets kinda hot after transmitting a while. Also, MEDIA connector keeps charging phone with ignition off.