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I don't know exactly what you mean - but perhaps you are talking about the foam like bits that are fixed on the chassis around the place where the bullet-like bolts screw in? These are about 20mm in diameter...
EDIT:- This information is for a W123 - not a SD - sorry
Last edited by Stretch; 06-12-2010 at 04:35 AM.
Reason: I was talking about a W123...
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