these just look like the blunts on my 280CE right.
eBay Motors: MERCEDES alloy wheel 6.5 x 14 factory wheel (item 230250985240 end time May-15-08 13:23:15 PDT)
above is an auction for same rim correct? They started with 25 and Buy it now for $50 That's where I got my value for these rims as silverstar sells lots of mercedes parts.
Maybe you can email the seller and ask from what he got these rims off of ? As the part number is same as yours.