The footage for XNK0830 is from the film Drei Lederhosen in St-Tropez, which is a bit curious, considering that that film is soft porn only.
That makes me wonder: has anyone here ever come across a hardcore version of the film?
In case, you need to have your memory pricked: the story has a few friends from Upper Bavaria travel to St-Tropez, accompanied by a bull they plan to show off to the locals. Various slapstick ensues which makes them acquire a caravan, prevent a bankrobbery and, of course, befriend the local topless beach totty. There are several sex scenes situated inside some kind of straw-walled beach hut, and these feature the likes of Sascha Atzenbeck, Margit Ojetz and Mario Pollak. One of these (with Pollak) is the mentioned scene with XNK0830, and this scene stays soft in both the German and Dutch DVD releases.
Furthermore, earlier in the film, XNK2803 attempts to fellate Mario Pollak but (for the sake of an FSK16 video certificate) has to confine her activities to fellating a large sausage.