Turbo leaking oil??

[Boggy]

Hi there. Took out today the engine tray to clean it and found oil leaking from the turbo i think. Was cleaned few months ago with mr muscle. Could that destroy any gasket, seal etc? Should take it apart and check the oil drain passage? If i need to change any seal after can i have a part number?
P.S. my car is an a4 s-line 2.0tdi 140 with BRE engine code.
Thanks