In Addition;

My air suspension system works --except when it gets REALLY cold. My X5 is parked outside and when the temps drop into the teens -or lower- I get a "SELFLEVEL SUSP. INACT." message up on the dash. It doesn't go away when the temps go up or when I restart the car.

I've had the car at the shop for other work, and when the techs clear the error to perform a diagnostic, it doesn't come back. The leveling system works fine again, and all is well.

Has anyone else experienced similar symptoms; the self-leveling suspension system throwing errors in cold temperatures. Would love to know if this is a failing sensor(s) or just a failure in engineering/design?

I don't know what the error codes are, but I'm planning on buying this ECU reading tool to help try to diagnose the problem before temperatures rise on average:
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Thanks in advance.