I almost bought a rack new rack dampner pin a few months ago. Mine is now fully adjusted inward and I still have moderate shake at idle. I just didn't want to fork over the 60 dollars for such a "rip off" part. I took it out of my 300sd and inspected it. It's basically a bolt with a spring assembly. How can they charge 90 dollars at the Stealership for that part. However, If I knew that it would smooth my engine at idle dramatically I would get it yesterday. The problem is that you can't really tell by looking if the old part is good or bad. The mechanism is still functioning...just a matter of whether or not the spring is still strong enough. A bit of a dillema for me.