I've grown up and currently live in predominatly warm climate parts of the country (FL and TX). I am going to be driving up to Omaha, NE sometime before the 25th depening on snow/ice, and the temps are supposed to be below freezing for a good amount of time. I am only going to spend a week up there, and probably not drive too much. My car was just in for the 15k mile service, and my parents who used to live in the midwest (up until I was born) told me to get the antifreeze checked and/or changed on the way up to Omaha to make sure it can handle the cold. Would this be wise, or is this information based on the cars from the late 70s, early '80s? The 335i was EDed and Re-delivered(in Chicago) in the summer, so the VDC/Dealer in the US probably did not change any fluids for the climate, right? Anything else I should watch out for (besides the performance tires will not be the best for icy conditions)? Thanks for any help!