Brake master cylinder

[Satnavsatnav]

Please can some one tell me how hard is it to change the master cylinder , my motor is 2005 Avant 2ltr tsfi quattro sline . And are there any things I should look out for , it's a very tight space I'm hoping it's just enough space to get it out without taking the booster out because that looks even tighter , I looked on the net found a million answers but not to my car , so I'm wondering do you guys know cheers 

[Satnavsatnav]

Has nobody any ideas , any help will do thanks