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What Is the Matter with Willi? is a 1970 West German comedy film directed by Werner Jacobs and starring Heinz Erhardt, Ralf Wolter and Ruth Stephan. It was based on a character Heinz Erhardt played on television. It was followed by a loose sequel That Can't Shake Our Willi! and in 1971 a third film Our Willi Is the Best was made with Erhard returning as Willi. The final film Willi Manages The Whole Thing was released in 1972.