Might want to post in the Tech Help section or a want ad the P.P. classifieds. This section is a lil slow compared to the others. Someone will help you out there with the part in a flash.
Also the dealer is an option. Its probably the best option in my opinion. They will have diagrams for you to find the correct part. If you don't have a dealer close by then Ebay, Peach Parts classifieds or your local boneyard may have what you need. It is not an expensive piece even from the dealer. The dealer may save you a little running around as well. Time is money. Going to the wrecker for a $20 part when new from the dealer is a waste of time in my opinion.

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Chris
84 280sl
82 300d euro