Has anyone had this problem or seen a service bulletin? At temperatures below freezing especially if the car has set overnight the rear of the car bounces almost uncontrolable for 45 minutes of driving or until the outside temperatures get above 32 degrees. Are the level control lines expanding enough in freezing temps to make the level control not operate? I first noticed this after the car was on a lift or on ramps to change the oil and suspected by running the engine to check for leaks the rear level control may have maxed out the rear vehicle height making the ride very hard but both times the temperature was below 32 the next day. Since then it has done it just from the cold temperatures. Thanks

There might be some water in the lines. You may need to purge the lines.

I have the same issue when it gets really cold here, you might notice the compressor being quite loud, I just deal with it until it warms up