I have a 07 TL type s and it has a slow coolant leak. It is starting to pool under the ring of the car. I can't find where it is coming from. The hoses look fine. The car is not overheating and is running fine. I just don't know where to look now.

 

radiator cracked i bet. It typically happens at the plastic/aluminum seams. Replace your radiator with a DENSO model from RockAuto or Amazon.

 

^^^ this. Cheap and easy fix.