I got my replacement diff yesterday so I figured that I should replace the differential mounts when I install the replacement.

My question is how many are there?

On my parts searches I see two different ones. Supposedly I will need two each.

One of them looks like two washers held together by some rubber and the other one is a metal tube filled with rubber and the thing the mounting bolt goes through.

Do I need two each?

If so, where do the flat ones go?

Is there anything else I should replace while I'm under there?

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1993 W124 300D
-297K on the clock as I type this.