audi 80 electrics

hi all a friend of mine has just purchased a 1995 audi 80 tdi estate and he asked me to have a look at it, this is where the problems start, ITS A MESS on the electrical side of things,

1 speedo and tacho off 2 rear wiper off 3 indicators off 4 oil light not coming on 5 reverse lights off and it looks like someone has replaced the fuse box under the bonnet and fitted it the wrong way around i.e. fuses at the back. what i would like to know is ......are there any more fuses anywhere and if so where are they located, and where can i get a wiring diagram and a fuse box diagram. also whats the procedure for taking the airbag off as i need to remove the steering wheel. all help gratefully accepted regards bill nicholson