2000 ML430 Trans Vent

[dakat]

Gilly: I have a 2000 ML 430 with 45k on it. I drive on the deserts of So. Cal and Nev when the outside air temps are in the 100's F, and although the engine water temp never gets above 95C I have experienced a small leakage from the small grill on the bottom of the bellhousing. The local MB says I have no leak, but I have seen evidence of it on the underside of the floorpan, mostly on the drivers side back seat area. My question is regarding a trans vent. Could it be in this bell housing area and is expelling fumes while hot, but no other time, or could I have a small leak in the converter, or front of the trans. Thanks-------David L