The German title translates into "The Crazy Gun". This was an attempt to cash-in with the popular The Naked Gun: From the Files of Police Squad! (1988) series, especially because Leslie Nielsen was the main actor in this movie.
Leslie Nielsen (Harry Haber) and Tony Rosato (Cliff Haber) are the only two actors to reprise their roles from Rent-a-Kid (1995)
One of three roles Leslie Neilsen reprises in a sequel. The other two were Frank Drebin (The Naked Gun), and President Baxter Harris (Scary Movie 3)