There is a trim piece that cover the underside of the gear box, have a look here:
http://www.realoem.com/bmw/showparts...87&hg=51&fg=70
If you have a look at the statement at the bottom of the page "Items pictured but not listed are not installed on your vehicle." although the part exists, it doesn't look like its fitted to the 3.0i
It is fitted to the 3.0d - I know 'cos mine ripped off when i went through a deep puddle!!