Help needed with a part name, please.

[Potatopete]

Hi folks.
I've had a cold starting problem recently and have identified the problem but have not a clue what the part that needs replacing is called.

The two photos show the part, the second is just a closer shot.

Thanks for any help.

 

[Welshquattro]

http://audi.7zap.com/en/rdw/audi+a4+avant/a4/2001-249/1/103-103070/

I'm guessing it's a 2.0lt

 

[QuattroCalum]

It's a breather pipe for the rocker cover, a particularly fragile part especially on the 2.0.

 

[Potatopete]

Fantastic. Thanks, Welshquattro. Been trying to find that diagram for ages. And yes, it's a 2.0.

Cheers, Quattrocalum. All help appreciated.