Becks, probably.
I don't drink a lot of German beer, but Becks is quite often the best beer available.
Have you ever walked into a place and the converstation goes like this.
Pretty, young bargirl: What'll you have?
You: Beer for me. What do you have?
PYB: Oh, we have everything.
With a little experience you know that by everything she means Bud, Bud Light, Miller, Miller Light, Amstel, Amstel Light, Heineken, maybe a Shiner Bock if you're in my part of the world.
This is the time to ask for a Becks because there's at least a fighting chance that she will actually recognize "Becks" as the name of a beer, unlike say, "Chimay".