Originally Posted by gsxr

I wouldn't bother with venting the PCV into a catch bottle. I did that, all I got was oil smell in the passenger compartment when sitting at a stop light. Clean the intake if you want, and forget about it. Nothing is wrong there.

About the idle/shaking issue, you have a number of things to check. The ELR (electronic idle control) may not be working properly, could be delivery valve seals, bad motor mounts (very common), injectors, etc, etc. But unless the EGR is hanging open (not likely, but possible) that has nothing to do with it.

As a new 1987 300D/TD owner, I'd recommend reading this article, which has some assorted background information on that particular model:
http://www.w124performance.com/docs/mb/articles/124.1x3_buying_tips.txt

Also check out this link for photos of the EGR disabling process.