The Knight"s Cross of the Iron Cross was awarded to recognise extreme battlefield bravery or successful military leadership. He served as a lookout on U-123 on numerous war patrols under the command of Kapitänleutnant Karl-Heinz Moehle, Kapitänleutnant Reinhard Hardegen and Oberleutnant zur See Horst von Schroeter. The Knight"s Cross of the Iron Cross was awarded by Admiral Hans-Georg von Friedeburg on 10 December 1944 in Kiel.
In July 1945 Mühlbauer participated in Operation Deadlight, the sinking of various German submarines by the British.
Mühlbauer died, aged 81, in Laussnitz. Bibliography.