Hi Guys!

Today during oil change procedure I noticed a small sweating marks on both sides under the turbo area...
It is wet, but looks old or long time there / nothing fresh - maybe the sweating is very small but is..

Is this something I should be worried?
Any job to do or can live with it?
What is causing this?

BTW - no oil marks on the plastic bottom panel.

















mg]https://i.imgur.com/JJhnsvQ.jpeg

 

Maybe this will help
I had the same problem (+heat shield slightly greasy) and during the inspection at Bentley they had identified a leak (and therefore replacement of seals) on the turbo oil return line.
The seal reference is: 078145757 - cheap part, but you'll have to dismantle the stabilizer-bar support cross-member - 3 hours of labor ( Bentley)



It's not major in absolute terms, but there's always the risk that, in time, the oil will catch fire on the catalyst
You should also have a slight smell of oil in the wheel arches when the engine is hot and the fan is running.

 

@redstr3842 - thank you, will investigate this path...