2016 Audi S3 leak w/ picture

[wzy104]

Anyone know what this is? Came home today to find that pile of goo on my usual parking spot. Since I only park my car in one spot all the time and always facing the street, it would seem that it's coming from the driver side in the area around the rear wheel. I went out and started the car and have it move in the driveway and apply brakes to see if anything is leaking.. I didn't find anything. I also let it sit idle while I check for leaks, didn't find anything also. Anyone have any idea? I put my hands underneath the car around the rear wheel to see if I can feel any oily leaks and also didn't find anything.

I attached a picture of the pile of pink/red goo on the ground.