Nope no backseat passangers......
and no to a real temp change.... went from -7 to -1.....C

Ok..... the end still sits kinda low.... but only 'sometimes'.

I've noticed that EVERYDAY when I get in the car in the morning, or after work.... IE anytime she'* been sitting for hours..... when I start her up, the air compressor runs for 20 to 30 seconds...... I don't think that is normal.

Now I've tried just getting in the car... and waiting... nothing happens until I turn the key.
Now I haven't tired just opening the door and starting the car, and seeing if it does it.... I'll try that when she comes back from the shop.

Anyone have any ideas? Bill it'* still too friggin cold to try your soap idea.... but I'll ask if they can try that at the shop.

You gotta do it. It'* the only way to tell. The air leaks out of pinhole cracks too slow to be detected normally. The soap will show what nobody else can see.

Also after you try that test, if it doesn't show any problems, check your rear springs. My rear end was real low and I changed the springs and wow it'* so much better.