Not sure, but I think the gas station at the beginning is the same they used in the episode 'Nachttankstelle' of 'Kottan ermittelt'. The year would fit (1978), and it's just the sort of thing the guys at ORF would do at the time.
Anyway, I liked the little bit of 'When the Saints...' backstage.
I first got aware of Waits when he was in 'Down By Law' and it's been an on-and-off, love-hate thing ever since. Sometimes I think he came through a time warp from the depression era. But the again, he is probably someone who'd never fit in, no matter where or when. Which is the thing I like best about him.
And since it's safe to assume that only very few of the happy bbs mutants know about Kottan, here are two links to enlighten you: