[urq] where's this hose go?

[Mike Fitton]

It's a rubber hose, about one inch diameter.  One end is connected very 
securely to the valve cover, just aft of the Audi/VW logo.  The other 
end is connected to nothing.  It just goes down and hangs more or less 
over the front right axle.  I can't see anywhere that looks like it 
should plug in, but surely it doesn't just go nowhere.  Any comments, 
other than I'm an idiot for not noticing this sooner?

-Cheers!
Mike