I have recently replaced the rubber muffler hanger that is part # 129-493-02-82 along with the rest of the exhaust hangers. While I was under the car the other day I noticed it was missing again. It seems that since all the prongs that it sits on face the same way - it just walked off the mount I guess. After some research online I saw a picture of one of the posts that is internally threaded, and there was a bolt and washer to hold on this mount. Is this correct as I have not noticed this on my 1992 300sl. Waiting for a new one to arrive next week, if there isn't some form of holder for this to keep it in place might have to rig something. Any ideas or pics of the correct way to hold this mount on would be appreciated.