Mute is relatively simple (more) (archive)

There is a wire on the Nokia car kit which sends a ground signal when the phone is used. This can be connected to the BMW phone mute wire, which can be found on the large 17p connector on the radio chassis. I don't remember the color code for E39's, but it should be clearly marked on the dealer's documentation. It's either pin 4 or pin 13, but I can't remember for sure.
Not certain about where to pickup the speaker wiring though. I suppose the most direct and foolproof way is to simply connect the Nokia's speaker output directly to the second voice coil of the door speaker on the driver's side, leaving the BMW wiring unconnected. However, if you can talk your dealer into printing out a copy of the appropriate section of the schematic from his service documentation, the phone speaker wiring should be easily traceable to a more convenient connection point.

Best regards,
Bob

: as the phone's external speaker? I understand there are some aftermarket kits/parts (Stinger?) that automatically mute the radio and can tap into the door speakers when the phone is in the cradle. I know that you cannot use the phone controls on the steering wheel nor the MID with the phone but is anyone familiar with the mute and speaker functions?

:
: BTW, I have a June build 1997 540i/6 and am using a Nokia 6166 thru AT&T.

: TIA

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