I just wanted to make a comment regarding the original question. My manual shows a diagram about ride height adjustment for the 5a. It is done by measuring the inflation of the air bags. According to the drawing, the front bags show be inflated to 7" and the rear to 7 11/16" (like I am really going to be accurate to 1/16") including the attachment plates. I was trying to figure out why the left front is slightly higher than the right. I have only measured the front set of front airbags, but the left one is a bit more inflated than the right. Since these bags are clearly different externally, probably from different manufacturers or eras, I am leaning toward the idea that that is the explanation for the difference in ride height from side to side. After all, even though they are controlled by the same valve, that valve only would insure that they have equal air pressure; it would not insure that bags of different design would inflate equally. Does this make sense?
If so, when replacing air bags on one side only, it would make sense to try to match what you have on the other side.
