Hello Christian,
Like said Matthias, in the book of JB Frappé, you don't have the location of the crash but JB Frappé situated combat between Vire and Carentan. 3 others pilots of the JG 11 crashed this same day: UFFZ Helmut Ried (2/JG11), uffz Erich Kerntke and Uffz Heinz Schuch (1/JG11). Heinz Schuch was the only one alive. All the pilots were "MIA". But Uffz Max Gehringer is "dead" and not "MIA" because you can find him in this website:
http://www.volksbund.de/graebersuche in the cemetery of Champigny St André.
Nota: In the excellent book of JB Frappé, you have a witness of Heinz Schuch of this day.
Fredo