Due to an unfortunate incident the future of my X is in flux. I’m weighing some options for a number of replacements should it come to that and I found a 2015 P4X 6MT with 76k on the clock. It’s 120 miles away so I’m gathering info via email and the following photo came back. Clearly there is some kind of leak my question to you all is what do you think is causing the leak? Failed RTV? Brake fluid? It appears to be on top of the diff. The dealership BTW claims there’s no leak.