A4 2.8 Manuals

Hi guys I`m new to this site and was wanting to know if any of you could point me in the right direction for any types of manuals that I can get for my 2.8 quattro?
Also i have tried to replace the back brake pads but can't get the pistons to go back in the calipers:banghead: any ideas anyone or is just me being a eejit?? LMAO.

Many Thanks
Steven

http://www.bentleypublishers.com/

http://http://www.audiworld.com/tech/wheel2.shtml