thanks pal, ive bleed the system for ages going up and down and had the tank at over 1bar but makes no difference,, the story was when i took it for the mot the whole suspension was working fine,, the mot guy said ive got to take the suspension write to the top to check for leaks in the system,, he did that and then took it write down to the bottom settting, the front leveled and the rear stayed on the floor.. not his fault this would of happened the next time i touched the buttons, when i got the car home i noticed that there was LDS fluid comming out of the rear right rubber boot so got a full new hydraulic ram unit with new boot, put the new unit on and still wud not work? i thought it must be a sphere but was told on this forum that a faulty sphere can not stop the rear from raising?