Hmm. My old Jetta (1999.5), which I never bothered installing the Empeg's tuner in because I ran the Empeg through the factory radio, had one of the small proprietary VW coaxial antenna connectors. I don't know yet what my new Jetta (2002) has, because I haven't obtained all the parts I need for my Empeg install yet (I've been Empegless for over a week... the horror... the horror...), but I suspect it's the same from everything I've been reading on <http://forums.vwvortex.com/>.
(in case anybody's wondering - not that I imagine you would be - I'm going to get an old single-DIN VW radio and do the same radio/Empeg combo I had before, even though my new car has the accursed 2002 VW double-DIN radio... should be a hoot, since the new VW wiring harness lacks such amenities as switched power and headlight sense, preferring to communicate those over the car's CAN-bus)
Be warned that the antenna adapter that was referenced earlier in this thread will not powsr the antenna in some of the newer VWs - at least, not by the looks of it - and that means you'll get little to no AM reception and suboptimal FM reception.
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Daniel M. Zimmerman
Mk.2 #060000058, 36GB
Mk.1 #00101, 10GB