Most likely, Brian. The last information from one of the many German addresses I contacted was: (I assume you understand German.) "Fuer Auschwitz sind in unseren Karteiunterlagen ca. 280 namentlich bekannte deutsche Soldaten registriert. Hierbei handelt es sich allerdings ueberwiegend um in russischer Kriegsgefangenschaft verstorbene Soldaten. Dies trifft aufgrund des Todestages auf Ihren Vater nicht zu. Moeglicherweise befand er sich aufgrund einer Verwundung im Lazarett." Well, that' what you said too.
That my father was in the SS (at least towards the end of the war), and where he served and died, I only found out on May 3, 2001, from an article in The New York Times last year about the German Chancelor Schroeder, who - that is his sister - found the whereabout and grave of their father via the Suchdienst 'Volksbund fuer Deutsche Graeberfuersorge'.
By the way, my father was married in Germany, my mother and I lived in Austria. That's why my mother knew not much about him and did not receive a dead notice. My mother learned about his dead from a local newspaper clip at that time. I say this because it is often said that after the war nobody wanted to have been in the SS, which is unfortunately some cases true. I do not judge my father!
Thanks and regards,