There were 3 or 4 shades of gray used on the cladding.
Go to EPC, enter your VIN and pull up a data card.
The card will show the color codes of the body and cladding.
Is your car smoke silver or brilliant silver metallic ?

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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