Having bought my pre-owned 2008 with a next-to-useless iPod interface, I wanted a normal aux in to use my mp3 player with.

I didn't take any pictures while I made it but the finished article is attached.

A summary of parts is as follows:
3.5mm stereo panel-mount socket ($3 from RadioShack)
3 conductor cable (I used a 3.5mm to 3.5mm cable with the ends chopped off (A few bucks from RadioShack)
Blank button. No need to buy if you have no far of ruining it or don't ever want to remove it. (ecstuning for $22 delivered)
12-pin mini-ISO connector ($12 on ebay, also has an audi part number)

Tools required:
Soldering Iron
Drill
KKL cable for VAG-COM
4x Stereo-Removal tools

As I don't use the installed iPod connection, I just disconnected the ble connector from the back of my Symphony II+. It is hanging around behind the stereo.

I made a short length of cable between the 3.5mm socket and my new 12-pin mini-ISO connector.

Iso connector
Pin 1: Left
Pin 3: GND
Pin 4: Right

3.5mm Socket
Tip : Left
Ring: Right
Sleeve: GND

I then drilled a hole in the blank button and mounted the 3.5mm socket. It is held firm by a washer on the outside.

I removed my old button blank and threaded the iso connector through to the back of the stereo and connected it where the Blue connector was (Socket B).

Recoded the stereo for Aux input and hey presto it works

 

came out great good job

 

Hey,
I am looking to buy an 07 A4 but I don't think it has the ipod interface and I wanted to know if this would be possible to do the 3.5mm mod without that. Are the stereos on the 07 and 08 the same?
Also why do you need the KKL cable? you need to program something? I am a noob at Audis so please bare with me :P


Thanks!

 

Just got a used 08 also. Did that affect satellite functionality? Hows the sound? I need to keep satellite.

Thanks,
Mark