Citroen C5 oil leak

[Tranquilo]

Anybody know what these parts and how to fix the leaks?

[darbuck]

The first picture is turbo hose you have oil on the compressor side. The top pipe is hard to make out is it the rubber hose if so it's a pcv hose. It looks split This could be causing the oil in the lower turbo hoses because to here is an imbalance in pressure. You need to replace it if it is split.should solve your issue.