The "earlier bounce problem" is most probably what has caused the squeak you now hear and it usually comes from the rear suspension bushings that have been stressed.I've replaced the air bladders and carefully purged air from the system,
even removing the shocks and priming them with fluid. Earlier I had
"the bounce" and the rear was dragging. So I've learned a lot about
the ADS-II system. The ride is good now, though the suspension
switch doesn't seem to do much. Then there's the nasty squeak!