Oil change Hinterachsdiff.

Hey, guys.

I've picked up my V8 in the garage and am just changing the seals of the rear axle differential. The Rep. guide says to fill in a SAE90 hypoide oil.

Now my questions:

1) which Audi part number does this have? Is G052162A2 the right one?
the cans have only the inscription ATF OEL and have no opening.

2) How do I fill the oil ?

Thank you for your help,

Goofy