I have just removed mine so here is what I did.
Undo shockers at the bottom end
Jack up body until wheels just leave the ground
Lift the bottom rubber boot on the Boge unit and you will see two nuts
Undo these nuts that are locknutted together, I had to thin down spanners to fit them on together
Undo the 4 bolts at the top of the unit
Unit should now be free to remove, remember it is pressurised.