Sorry about that, on my car, the valve cover breather is attached to a hard black plastic tube that attaches to the top of the EGR valve and then on to the neck of the hose coming from the air filter housing. Hope this helps. I also have another link for a mercedes archive search that might help:

http://www.mercedes.cx/archives/mq.html

Good luck,

AARON ROCHARD

1976 230 W115.