put car in high, put axel stand under car. then chain wrench or tool. give it a hit with a soft hammer. then they fall off. only undo a slight turn. do not undo them at this stage.
then take the axel stands out and release pressure from system. in low and bolt on accumulator undone. then jack up and down an have cup of tea.
then jack the car up again as you most prob wont get the jack out. unscrew them and be ready with the towels to catch the spillage.
or if ya real good recharge the speres on the car. used to do that on the cx's to save time and hassle.
BX is so easy to work on compared to CX ha ha ha