On the night of 7 December 1944, Augenstein's Messerschmitt Bf 110 G-4 (Werknummer 140078—factory number) was shot down 10 kilometers northwest of Münster-Handorf by a De Havilland Mosquito night fighter of the Fighter Interception Unit, flown by RAF ace Flight Lieutenant Edward Richard Hedgecoe and Flight Sergeant J.R. Whitham.