For future reference, from what I’ve seen on numerous truck chassis at Freightliner dealers, the standard Airliner truck suspension has one leveling valve that feeds both airbags. With one leveling valve, there is no side-to-side adjustment. Both airbags are raised/lowered in unison.
The chassis Renegade uses has two leveling valves, one for the driver side and one on the passenger side, presumably because the side-to-side load varies more on an RV (e.g. slides, waters tanks, etc.).
My brand new Verona leaned quite a bit on the passenger side. The passenger side leveling valve did not have enough adjustment to raise the airbag to level the RV even with the driver side valve adjusted to it lowest airbag height position.
On my chassis the passenger side leveling rod was simply too short. This was caused by an incorrect (too short) leveling rod or the lower leveling rod bracket on the axle being welded in the wrong position. Consistent with your observation, my brackets had evidence of someone beating on them with a hammer to move them in an effort to level the coach.
The adjustable leveling rod on the passenger side of my chassis fixed the leaning on the passenger side and leveled the chassis. It’s important to note that when leveled, the adjustable rod was about 1.25 inches longer than the OEM rod. Based on the number of complaints of leaning coaches, my guess it that the extra leveling valve for the RV chassis is an atypical alteration during the manufacturing process and Freightliner isn’t taking the time to get it right. It’s too bad because a $15 part (adjustable leveling rod) is all that’s needed.
Some additional tips when you level your coach: make sure you have enough air in the tank (they lose pressure quickly when you’re adjusting the valves); start with the adjustable leveling rod in the same length as your OEM rod and put an index mark on it by scoring it with a razor knife; adjust it to level the coach (measure frame to ground); drive around the block and repeat the adjustment until you get it level in the rear. Put additional index marks on the rod each time you adjust so you have a visual reference. If the FRONT of your coach isn’t level after you level the rear, you need shims for the front leaf springs, but that is a different thread for another day.