|An Auxiliary Audio Input to the Audi OEM Head Unit and CD Changer|
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My plan is to provide an auxiliary audio input to the Audi OEM head unit and amplifier, on most newer Audi cars, equipped with the CD Changer. This applies to the allroad, A4, A6 and TT, as far as I know.
Here are the basics of what I have done to some 10 different Audis.
I pull the head unit, and locate these wires on the top connector, like is shown here.
These wires correspond the the line level outputs of the CD changer, and the input to the head unit on this familar label here. Look in the lower left portion of this label.
The relay will toggle between the CD changer input, and the Aux. input. Refer to this assembly here.
The mini-plug cable will come out below and to the right of the ash tray, sort of like this.
It could also be made long enough, to run along the bottom of the center console, out from the area under the ash tray, and come up between the center console and the passenger seat.
The best and easiest place to mount the switch and LED are next to the cig. lighter, here, in the ash tray.
Another look, a bit larger.
Here is a view of this connection using an Apple iPod. I provided power for the iPod also.
This is my personal install. I routed the stereo cable under the center tunnel, and up through the small rectangular neoprene spacer used for the phone cradle.
I can stuff this cable into the space below when I'm not using the iPod.
I used a Radio Shack cell 'generic' phone holdere, along with the Audi phone bracket.