I cannot find the name of the cover model of Playboy Germany December 1996 issue, titeled "Erotische Engel".
http://www.pbcovers.com/pbcovers.php?c=de&y=1996
There is no data in the issue about the model or the photographer.
As far as I know besides the soft version which has been published, there was a more explicit version on the internet.
Some websites say that this is Annika Walter, a german diver. However it's a wrong information. The diver indeed was in the issue, but not on the cover.
http://celeb.gate.cc/de/annika-walter/pictures/1da48ea1c1.html