So found no leaks in the pipes nor the valves, bags are new and i decided to rise the car to its full extension and left it for a night and it didnt drop at all, so could it be calibration although it had been calibrated after installing the new bags ?

 

Doubtful, provided the height sensors are secure and not faulty, there is no way calibration can drift.

I had a similar issue after replacing the AS Unit, for a few days it would drop over night, then gradually it stopped doing it. I can only summise that because the quick connect fittings/pipes are not brand new, they tend to leak a little bit at first.
Then with vibration and continual pressurisation/de-pressurisation the fittings "settle down" but that's just a theory.

At least it's working which is good news!

 

I'm having the exact same issues as you....very slow leak over a few days (new airbags) and no leak when I manually raise to highest point. Will be testing some of the suggestions in this post. Its very frustrating.

 

i have pulled out the pipes and cleaned the area where the pipe insert and put them back and made sure they are all tight and didn’t drop this morning, i will try to leave for two nights and will see! Thnx guys for the help appreciate it.