When both German 4-man-teams, rivals since their pre-war youth at de:Sportclub (SC) Riessersee in Garmisch, only qualified in mid-field, they decided to join forces. With Friedrich Kuhn and Franz Kemser, the heaviest members of the other team that withdrew, bob "Deutschland I" won all four heats. The Gold medalists had a combined weight of 472 kg, or an average of 118 kg per person. The rules were soon altered, introducing a limit of 400 kg. The German movie de:Schwere Jungs (2007) is based on their story.
Ostler won four medals at the FIBT World Championships with two golds in 1951 and two silvers in 1953 at home in Garmisch-Partenkirchen, each time both in two-man and four-man.