Aux In On Hu And Nav+ Found!!!!!
First of all i must say that this will work with any of the Stilo's head units as long as they have the CDC conection and providing they have got a CDC, if you havn't got it it won't work.
Ok, what i've done is tap into the CDC's audio cables and used them to take my aux cables sound to the HU. For the head unit to "accept" sound a CD must be playing so what i did was make a CD that had a silent song playing all the time (easily achieved with any recording program inc windows recorder and putting the microphone volume on min and the burning a CD with the track you've just recorded.
The wiring is very simple and can be done by anybody (just don't blame me if you break something):
The CDC connector looks like the one i have circled in red in the attatched diagram. You can access the connector either at the back of the headunit or behind the CDC itself as the cable that comes out of the CDC is connected to the cable that comes out of the HU just behind the CDC, and this is the easiest place to get to and work (don't try to do it inside the CDC 'cause the connector is pretty well hiddn and is welded to the main circuit so you'll just break it if you try it there).
The two pins that are circled in green are the two sound channels. If you are using regular sound cables, once you cut them you'll notice that each one is formed by a single cable in the middle (this one carries the sound) and a load of copper wiring surrounding this cable (earth cable witch is designed to prevent interfearances). The surrounding wire is needs to be connected to the pin circled in blue; this is very important because otherwise you'll get really big interfearance! You can connect the earth from both cables (left and right channel) to the same earth pin.
I think i've covered just about everything and i'll be pleased to answer any questions.
I will also post some photo's of the system i've installed (Harman-Kardon Drive+Play) later.
Hope this is heplful!