This is on a 2002 Golf
- First remove the trim piece from the very rear of the headliner, you can pull it off by hand, no tools.
- Remove the little white plastic piece in the center of the now exposed headliner
- Pull down the top of the c pillar trim plates, your fingers should be plenty of force
- Gently nudge the headliner away from the c pillar trims now, until the headliner is backed out to the door, this should give you plenty of access to the antenna.
- Remove the antenna (3/4 socket)
More antenna advice
From MoGolf's excellent Yahoogroup post: