Audi Repair: 1996 audi 2.8 vaccum diagram, oxygen sensors, vacuum problem

Question
i'm trying to locate a diagram showing the vaccum lines for a 1996 audi quatrro 2.8  . i'm getting the codes p1101 and p1106 . i would appreciate any help i can get thanks

Answer
The codes you indicate are for both Oxygen sensors (bank 1 and bank2), not a vacuum problem.  Part of the code is 'air leak' but I do not think this is a leak in the vacuum side.  If there is no leak in the exhaust system, I would suspect the O2 sensors.  Hopefully nobody has ever added lead additive to the fuel?  Let me know,  Jan