David,

You cannot miss the vent duct; it is there very obvious!

One tip (for you especially): remove the screw of the hood release, gently take out the handle, pull the hood open and hold the outer cable while you push the handle back (so you can release the outer cable out of its fitting), turn the inner cable a little and take it out of the handle...it is a lot easier as the way you described in one of the other posts...

The dash ventilation ducts blow some air regardless what the setting of the ventilation flow is; that is normal.

greetingz,

__________________
1990 300SL-24
1993 C250D with a minor 600+k kilometer
www.MBenzNL.com(the Netherlands)