ok thats easy, there are 6 screws you need to take out.
when you take the ash tray out right at the back of the consul there are 2 screws in there that need to come out. then the other for are behind plastic caps. you will have to move the seats back as far as they go so you can see them. they are a pain to get out. so be very carful. the other two are right down in the foot well. again with plastic covers. undo all of those and remover the bit of plastic under the hand break so you can lift it up over it.
but be careful when doing this as you have got the socket for the vag com to be worried about, then you have the fuel cap button and the traction control button. unclip them, not forgetting which is which, and the start installing the arm rest, you will need a dremal to cut the coin tray out so the base can stick through.
and thats it.