Single-Din to Double-Din ConversionItems needed:
You will find all the necessary parts and tools needed at www.enfig.com(1) Double-Din Headunit
(2) sets of radio removal tools. (for future double din-removal)
(1) Wire Harness for 1987-2003 Volkswagens (single-din radios)
(1) Radio Wiring Harness VW 2003+ DD To install OEM Radio
(1) Antenna Adapter For 1995-2002 Volkswagens Small (single-din radios)
(1) Antenna Adapter VW 2003+ For DD OEM Radio.
The new radio unlocking code
You can obtain this at your local dealer with your VIN and the new radio
serial number (found on the side of the radio, it starts with “VW”).
Insert two of the radio removal keys on both sides of the single-din radio.
Once they “click” you can firmly pull them both and the radio will come out.
Disconnect the radio and pull out the cables. Be very careful not to break
or tear any cable.
To remove the din pocket, firmly pull on it, and it will come out, it does
not have any screws, only a clip in the back that unhooks with the right
pressure.
Insert the small single-din antenna adapter into the end of the double-din
antenna adapter.
Plug the antenna cable to the end of adapters.
Use the following wiring diagrams to connect the cables from the single-din
wiring harness to the double-din wiring harness.
Single-Din Wiring Diagram

Double-Din Wiring Diagram

Cross Wiring Diagram
Organize your cables (I used electrical tape) and push the harnesses and the
extra cable back and out of the way, then push the radio until it clicks in
place.
When you turn the radio on, “SAFE” will appear in the screen and, after 3
seconds, “1000” will be displayed. Using the radio pre-set buttons 1 through
4, insert the unlocking code. Button 1 sets the first digit, button 2 the
second, and so forth. Once the code is displayed, press the seek up button
(^) until a beep sounds, and a radio station is displayed in the screen.
NOTE: If you don’t hear the beep in over a minute, it means that you entered
the wrong code or you made a mistake. You can repeat the procedure again ONE
more time. If you don’t enter the correct code in the second try, it will
lock itself for one hour. You need to leave the radio ON for that hour and
then try again. The process will start again and you will have two more
tries, and a pause of one hour if you miss again. (this is what the VW
manual says, I did not experience this)A special thanks goes out to Daniel Rodriguez for this How-To