i drove last 2 z's in the winter no problems. one time i had the same incident in snow on highway. i was going like 50 though an i didnt go sideways just slid around alittle an regained control. deffinetly was NOT safe at all. i was really nervous and regained control of the car as quick as possible.
now i have tt though. hoping its not too diffrent. although i know it will be.