busted shock vs air compressor




is there a easy way i can determine if i will neeed to spend 1500 for a new suspension shock or if its just the compressor? ( which i dont know how much it cost....)
thanks
Observe what happens.
If you turn on the car and you hear the compressor working and trying to lift the shock and it doesn't go on then its the....
If you turn it on and you don't hear the compressor then its the....




before i went to the shop i did press the button on dash that did lift the car, but i could hear it leaking out
when i asked the tech, if the compressor is bad, then why are the other 3 wheels still up and not sunk
he said that the system knows when there is a defect to lock the other 3 wheels at a specific level, that is why they didnt sink
does this make sense?
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i dont know if i got shafted or this is legit where the other three shocks will lock at a specific level when the system is trying to over compensate for the busted one.
the other thing i mentioned was that i didnt press the up button untill this morning when i drove it 2 miles to the shop, but the tech said the compressor is always working anyways to give air the whole system......
regardless its being worked on, i gave the ok but i asked him to get the arnott system. of shock and compressor, to save some money. i dont know if he was not thrilled with that as it is cheaper and maybe shoved in this issue of the compressor too...i dont know....
i havent been to this shop before but i was closest to location at the moment.




the compressor had already been replaced at 60000miles before this incident by MB.
just wanted to get the forums thoughts on if this could be legit issue or sounds outlandish,
thanks
but you have to hear it to know if its dead or not and at this point you wont be able to find out since he took it out







