He may not be seeing it because of the plastic belly pan or whatever its called. I've never been underneath a W140 but I imagine it has one just like a late W126 and W124.

__________________
1985 500SL Euro w/ AMG bits 130k
1984 300SD Turbodiesel 192k
1980 240D Stick China 188k
2001 CLK55 AMG 101k
2007 S600 Biturbo 149k Overheated Project, IT'S ALIVE!!!