I have the Hirschmann Antenna out of the 1984 300DT. I'm having problems getting the antenna opened so that it can be serviced. The snaps are proving to be problematic. The following link doesn't show much information on how to actually open the unit without breaking the snaps. Any ideas?

https://www.ifixit.com/Guide/Disassembling+Mercedes+W123+Antenna+Motor/20902