A couple of concern on my car

[hitbyastick]

Hello,
One of the things my 84 300SD does is shake a whole bunch once it's warmed up at idle. If I put it into neutral of park it get's a little better because the RPMs go up a hair. As soon as I get on the throttle, even if only a little and the RPMs increase, it smoothes out very nicely. The engine shocks have never been renewed, and I'm not sure about the engine mounts either. Could this be the problem?

There's a clunk of the rear suspension when I go over rough road. I'm assuming it's some bushings. The suspension itself seems very good.

There is some vibration from the front of the car at speeds. It is not RPM related or anything, and I doubt it's the drive train. Might it be an imbalance in the wheel? Or something to do with the engine shocks/mounts too?

And last but not least, where can I find
-a manual (for repairing, like chilton or some others), and do you recommend it. I do a ton of work on cars and I'm inclined to do everything myself, but just for references?
-a good mercedes mechanic, just in case, in the san francisco bay area.

Thanks a lot
-Christoph