As part of your routine undercarriage inspection, you should have done annually, the tech should be checking your air bags at maximum height for signs of deterioration. If your coach begins to lean or otherwise drop while parked, it's possible a bag or bags are beginning to lose air, although it could be a number of other things.

If you need or soon will need air bags now's the time to buy.

STEER&SUS_PROMO_MAY_2018_US.pdf