I don't know the answer, but once you find out, and they are probably different, this link will show you how the offset changes the tire mounting position.

"http://toy4two.home.mindspring.com/offset.html"

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Thank You!
Fred
2009 ML350
2004 SL600
2004 SL500
1996 SL600
2002 SLK32
2005 CLK320 cabrio
2003 ML350
1997 C280 Sport