Actually VW did away with the K-Line on the 2002+ DD Monsoons, replacing it with CAN-Bus. Some details on that here, at the bottom:

http://www.ross-tech.com/vag-com/aftermarket-radio.html

stahimooney, I have a 2002 GTI 337 which shouldn't be too different with respect to the install. My empeg sled is in a half-installed state at the moment, I'm waiting on an antenna amplifier so I can try to connect my tuner. Let me know if you have any questions...