why does my 99 towncar dump its airbags when its parked sometime

Oh is this common, one of fords better ideas! they are so common for the last 20 years a replacement kit is available for about 400$ so you don't worry about one blowing on a hard curve and rolling like a whirling derbish

Translated: Change out the failed airbags. They're leaking.

it is supposed to leak down. as soon as you close the door it leaks down a little. i just replaced my air bags and still does it. and there are no leaks..