Yes, it is used to deplete the air in the air bags, which lowers the coach. Iíll use this feature when setting up for camp or storing coach.
A couple benefits are lowering the entry steps and reducing the extended length of the leveling jacks, which increases stability.
A note when placing to auto; let the system air pressure build to the first purge(max pressure) then throw the switch to auto to restore to ride height. You can set idle speed faster to build pressure quicker.
Make sure to wait until coach is back to ride height before starting your travels.
Iím sure there will be some other tips coming your way but this is a start.
2005 Providence 39L, Spartan, CAT 350
2021 Jeep GC 80th