We have a 2004 Marquis with a tag axle. Is there a possible relationship between the location of the tag axle (up or down setting on driver console) and the even filling to ride height of the air suspension? Scenario is if the tag axle is "up" when starting the coach ( air bags are low from storage ) it looks like the main airbags will not fill or fill uneven until you drop the tag axle and then it immediately sets the airbags to ride height - the coach settles to proper height and driving symptoms are normal. No air leaks detected and if you let it sit for several days, the ride height is unchanged.