Originally Posted by Blairware

Guus - Thanks once again. In fact I don't mean to sound like I am being argumentative, and I am really pleased you have shared all this knowledge. I also read a bit (I think it may have been in the dealer education PDF that Don linked to earlier in this thread) about a "Slow fill" and a "Fast Fill" The slow is for when you are driving, and smaller adjustments are required (they use the example of fuel tank slowly emptying, but that wouldn't require pumping, but rather venting because the car is getting lighter, but I got the idea anyway. Then the fast fill is for when the car is stationary, and would also make sense if some pressure was lost from a long sitting period of a week or more. This gets the system quickly pressured and ready to ride. I do still wonder about your comment about waiting a bit before driving off - and another post I saw where the guy would get faults "when he drove off quickly" I think I get it now based on the fast/slow fill rates. If it's doing a Fast Fill and you drive off, it will probably cancel the fill since it's programmed to only do slow fill when in motion.

The theory holds until you get to wondering: Why can't a slow fill resolve the air suspension fault, even if it needed to run 20 times, it should still correct it. I ALSO wonder WHY, for petes sake won't it clear an ASF without "sitting for an hour or two. MANY reports have stated that an ASF, once tripped does not switch off until it's given that down time. Sigh. It's not like I am even getting a lot of them. I believe I have had 3 occurrences ever, and over the course of 6-7 days, and perhaps 20 or more trips in the car. It's just a mystery, and I DON"T LIKE MYSTERIES WITH MY CAR. In a good book, yes. In my Jaguar? NO! Keep the thoughts and info coming. I can't ever know too much about this.