There is Gustav's Jagerhaus and Loreley at the Phoenix Club, both off the 57 at Ball Rd. in Anaheim.
There's Old World Village Restaurant in Huntington Beach and, if it's still around, Red Lion Tavern in Silverlake.
There's Maximilian's in North Hollywood, but that's Austrian and Hungarian.
In addition there is Schreiner's Fine German Sausage in Montrose (not German restaurant, just butcher shop and some German things sold) and Alpine Village deli/bakery in Torrance.
Das ist aber leider alles...
re: Das Ubergeek
I unfortunately wouldn't consider Old World Village good (can't comment on the others as I've not been).
But if we're adding Metzgers, I'll recommend the European Deluxe Sausage Kitchen for some of the best Wurst.
European Deluxe Sausage Kitchen
9109 W Olympic Blvd, Beverly Hills, CA 90212