Has anyone tried using one of these trailer hitches? It will be used for a hitch mounted bike rack.

This one is a bit more than I'd like to pay:
http://www.hitch-web.com/proDescrip.asp?ProductCode=8907&OID=8

But would this one also work?
http://www.etrailer.com/products.asp?model=300E&category=hitch&year=1987&make=Mercedes-Benz&t1=&h=e

Of course I suppose I could just make my own...

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AJgeo
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I briefly owned a 1987 300D
Now I get around in/on these vehicles:
1982 Honda CX500 - 50 mpg
1995 Saturn SW2 - 30 mpg
2006 Surly Long Haul Trucker
2000 Trek 8000
2005 Honda TRX500FM