Audi A4 3.0tdi major oil leak help required

[steview]

Hi all,
Well I've gone from an RS6 C5 to an A4 B7 3.0 tdi and was relatively happy until it has developed a massive oil leak coming from somewhere high up at the back of the r/h cylinder head. There's not much room to see anything so was wondering if anybody techy on here has had similar problems or knows where to check or has diagrams of all the components to see what's around that area. Not sure if its a coincidence or connected but the brakes now feel like the servo isn't working.
Cheers for any help

[steview]

Now sorted. Was the vacuum pump had imploded and put a hole in its casing hence the big oil leak and no brakes. Not as expensive as I was expecting anyway.