Watch So weit das Auge reicht (1980) Official Trailer

Robert, a masseur who is hard of hearing, is unaware that he has inherited millions. Four people want to take it from him: stockbroker Kuhl, his employee Späh and their friends Anna and Iris. Späh wants his girlfriend Iris to marry Robert in America in order to get half of the money. After a murder that Späh commits, but of which Robert seems suspicious, Robert actually flees to America, but not with Iris, but with Anna, who has since gotten wind of the affair. Robert and Anna marry in Las Vegas, and it is only back in Munich that Robert finds out about his inheritance. Robert leaves Anna, Späh shoots Kuhl and there is a showdown between Robert and Späh on a French island.