You need the key in Pos 1 for abs valve to open to do the back start from the corner furthest away from master cylinder this being the nearside back then the 2nd furthest and so on, obviously it's a two person job unless you have a one man brake bleeding kit. As with any bleeding keep an eye on the reservoir and make sure it does not drop below the min level. It's normal when the car has been stood for the pump to run a while.

Martin