clean out this area completely.

then go to the parts store and buy some UV dye for checking oil leaks. Use that in the system and use a blacklight bulb or the UV light kit from the parts store.

You will find the leak for sure.

__________________
2012 BMW X5 (Beef + Granite suspension model)

1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)