Ein gemachter Mann oder "Falsche Fuffziger"(1979)

A Self-Made Man (also known as False Fifties) is a German comedy following a small-time vice squad inspector who stumbles into unexpected fortune. When police raid a brothel and uncover a counterfeit money operation, the ambitious police chief takes full credit for the bust. Meanwhile, the overlooked detective accidentally pockets a piece of counterfeit currency and deposits it at a nearly bankrupt bank. The teller, desperate to balance the books, credits him as a wealthy depositor. Suddenly elevated to high society, the humble inspector must navigate his new status while the real criminals remain at large. This clever satire explores ambition, luck, and the absurdity of social class through the eyes of a man who became rich by accident.