Check your data plate it should give you the color codes...

If you have black 040 it is typically over gray pearl 122.

You can get spray cans from:
www.paintscratch.com

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http://i19.photobucket.com/albums/b1...c/GOWIDE-1.jpg
1971 280SL ROADSTER
1988 300CE TWIN TURBO WIDEBODY
1994 E320 CABRIOLET
1999 C43 AMG
2005 G55K AMG
2008 CLK63 AMG BLACK SERIES