But what about Borislav's assertion that the headlight sense and telephone mute are tied together? That doesn't make sense to me, either. Did he get something wrong?

Wait, no, that's not what I meant. I meant that:
- the headlight sense wire and the wire going to serial pin 8 are tied together and both of them go to pin 10 on the docking connector;
- the telephone mute wire and the wire going to serial pin 1 are tied together and both of them go to pin 11 on the docking connector.

So the tel mute and headlight sense are NOT tied together, sorry about the confusion.

Borislav