Desperately seeking advice on this one.
I have recently bought an 07 Grande Punto 1.3 Multijet Dualogic.

Last week I discovered its leaking hydraulic fluid from what looks like a rubber/plastic valve or bung.

I am a bit scared to start undoing things as I don't even know for sure what the part is or if there is a particular/safe way of disassembly. I am also concerned if I buy a whole unit the cost will be prohibitive.

There dosn't seem to be anything at all on the net regarding a similar problem. Any thoughts/ideas on how I should proceed and where I might get parts are welcome!

Photo's show general location of unit and then a closeup showing the red plastic/rubber bung or valve where the leak is coming from.