Hello
If you have a 450SL with a dark interior, I've got some used car mats for you. They're presently up for auction on Ebay under item number:7907820256.
They're in good condition with faint wear where the driver's heel would rest while driving.
They came with my 450SL originally and I kept them around after I had to get rid of the car after an accident.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7907820256&sspagename=STRK%3AMESE%3AIT