Oil loss - but where?

Hi,

When my starter was exchanged at the beginning of the week, an oil leak was detected on my V8. It already sweated a little a few weeks ago, meanwhile (1000km later) it seems to have gotten worse. There are already spots on the ground.

The workshop initially suspected the KW-simmering, but I disagree, because nothing comes out of the bell - it is dust-dry. I would have suspected that it might be ATF or hydraulic fluid, especially as there are oil drops on the hydraulic pressure storage tank as well. But you think it's engine oil. I have no measurable loss from the hydraulics or the engine oil. The two ZKDs have already been made, the front one, and the distributors have also been resealed in the course of the last ZR change, and the valve cover seals have been sealed. But that can start to pee relatively quickly.

I took some photos of the underbody - looks pretty dirty. Do you have any idea what could be leaking?

Thank you and IG

Bastian