Yesterday, I found a small, blow-molded, black plastic part loose and lurking
under my rear seat.  It is marked with the letters "RHO", the VW/Audi logo
and part no. 251 837 267.  It looks like a container about 1 1/2" X 2" X 4"
with the open end reduced to about 1" x 1 1/2".  Does anyone know what this
is and, more importantly, where it belongs?  As clean as it is, both inside
and out, it looks almost like it could be some kind of acoustical tuning stub.

George