Hi, everyone
recently discovered some rear diff. leak. Havent had a chance to put it on stands yet and get a closer look. Does it look like the seal has got to be replaced ? How do I check the level of the diff. fluid?
Thanks.

P.S. According to receipts that came with the car, the r/r diff. seal was replaced for approx. $200 by an Audi dealer not too long ago.