Cruisemaster Level 3 Air Control SystemAbout Level 3 Manual Air Control System Our level 3 system is a cost effective combination of style, features and function. Allowing the user to level out the van while at camp using the manual adjustment switches, as well as ensuring the perfect ride everytime by adjusting the ride height to suit a varying load. Control the inflation of the airbags with switches to inflate deflate the left and right sides along with a digital gauge to view pressures.