Oh Dear Harry!(1981)

Original title: Ach du lieber Harry

Down-on-his-luck private detective Harry Werner just wants a quiet life, but trouble always finds him. When he stumbles into a case involving a missing woman, shady criminals, and a suitcase full of secrets, Harry realises he's in way over his head. A mix of comedy, noir, and chaos, this quirky caper proves that bad luck is Harry’s only constant companion.