Upland German Deli?
It looks to be very close to where the Upland branch of the Bert & Rocky's ice cream store was located before they went out of business last year. I stopped at B&R many times but don't recall seeing the deli -- let us know if you try it. The world needs more black forest cake, apple or cherry strudel, and sausages.
Come to think of it, I saw a German deli just off the 10 near Yucaipa recently, but it was closed that day. I'll have to try that one, too.