König Karl (1986)

In an apartment building inhabited by quarrelsome divorcing singles, the energetic senior Karl Zobawa establishes good neighborly relations. Inspired by a missionary zeal, he tolerates no contradiction. He has set himself the goal of turning his neighbors, most of whom have been through divorce, back into friendly people who can live together again. To this end, he draws up a whole catalog of measures that no one would probably have submitted to if it weren't for an impending press report about the house and its residents.