L322 2003 Air Suspension Probs

HI all recently had a problem with Air Suspension on my 2003 l322, kept getting faults cleared went for a while then AS lights went out if I was towing or carrying passengers, Had a new rear passenger side sensor fitted all well until lights went out again, still at normal ride height any ideas a member replied that it could all need recalibrating, a mate said could be the tilt sensor? any info would be much appreciated

If it had a new height sensor it will need calibration before suspension will work properly.

ok cheers for that