Look at how heavily modified the inner bulkhead is....
No battery space on the right and modified space next to the fusebox on the left.
Rear of engine bay was made wider and deeper with this modification to fit the M117.

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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