Truck Repair: Air Suspension, fleetwood motor home, freightliner chassis

Question
I have a Freightliner chassis on a Fleetwood motor home.  It's about a year and a half old.  The rear air bags have started bleeding off when parked.  Is there anything I need to look at to stop this or does this need to be repaired by Freightliner?  

Answer
It is probably an air leak somewhere causing it.If you could get a spray bottle with soapy water in it & spray lines,you might find where it is coming from.YES Freightliner may have to repair it.Or atleast get the parts from them if you think you can do it yourself.