The conversion was done before I bought the car. I just found out, that the shop that did the oil change 2 days ago, turned the switch in the trunk, and that's what caused it to change from air suspension disengaged, to check ride control. I turned the switch back, and my computer is now telling me the air suspension is disengaged. I'm fine with everything now. I appreciate your getting back, and I'm pretty sure I know the answer to my next question, but I'll ask anyway. Now that I don't have air suspension, I assume when I change the ride from normal to plush or firm, it doesn't do a thing, seeing as I no longer have the air suspension. Would this be correct? Thanks again for replying. Sincerely, Bill.