We have recently had a winter storm here in the midwest with below zero temps. I took my beetle out after having it sit for a couple of days. The coolant light started flashing red and then the check engine light came on. I added coolant (it wasn't really much below the line) and then the light went off for a minute and then came back on. Does the temp outside have anything to do with it? Not sure why it would be overheating in this type of weather. I even got the special kind of coolant for a vw.