The Kenwood Keg with Audi firmware installed can connect directly to the concert II head unit with no adapters all you need is the Audi firmware installed on your Keg, appropriate phatnoise “Jumper” cable and an Audi CD changer cable installed in your car.
The Audi phatnoise installation instructions for the A3 are here (tells you about the cables):-
http://www.phatnoise.com/audi/downloads/11-08-05_A3_PhatNoise.pdfThe original Kenwood keg cable is not compatible with Audi (different pins used on the Keg Plug) I have just done the same process but in reverse Audi to Keg I still have both my cables for my concert II not sure on a price & I do live in the UK but if you get stuck PM me.
You should also be able to buy the CD changer cable from any main Audi dealer using this part number 4B0-051-735-B & modify the end using the pin outs & attach a Phatnoise plug or just modifiy your factory fitted cable.
You can buy this plug from.
http://www.rs-components.com/index.htmlPart No 299-4597 Connector,rectangular,solder plug,26 way
448-4531 Connector,rectangular,plastic,screw lock,backshell,26 way
They have a Spanish branch
The pin outs are listed here
http://www.phathack.com/pinouts.html I bought my phatbox from Clair parts and they shipped to the UK so they should ship to Spain
http://www.clairparts.com/ they have the cables you need listed on their website.
If you already have a factory fitted Audi CD changer cable installed in your car all you need is one of these:-
This is a replacement jumper cable that connects the Phatnoise box to the cd-changer cable in the rear. CHOOSE THE CABLE TYPE REQUIRED FROM THE DROP DOWN OPTIONS MENU.
Part No.: 000-051-592-A
Sale Price: $ 45.35
You have a choice of a rectangular or round plug on the above jumper cable (this cable is short) some new >02 Audis have a rectangular CD Changer cable which is listed as a VW connection others have a round. The cable mentioned below is a round plug listed as an Audi Connection.
If you have no Audi CD changer cable or need to run one to the rear then you also need one of these & a round jumper cable which is listed as Audi:-
REQUIRED FOR CARS W/O CG CHANGER PREPARATION. This cable runs from the radio head unit in the dash to the rear where the Phatnoise is mounted.
Part No.: 4B0-051-735-B
Sale Price: $ 104.40
Hope this helps
Craig