Help1 Auto gearbox cooler? Or Power steering? S6 (97)

[bigtalljim]

I have noticed a fluid 'seep'on the front lower part of my bumber where it joins the belly pan. The fluid is redish in colour and I suspect it may be a joint behind the lower grill where a pipe comes from the car to a metal tube that loops infront of the radiator.

Is this the auto box cooler or some thing else?

Can I check the auto box level at all?

Does the front tranny and gearbox share fluid?

The car is Quattro if it helps.