First drive today in NH in frickin cold weather, below freezing, in my 3 month old C4S with winter wheels and tires. It was below 30oF. As I was expecting, car had a few squeaks and rattles and groaning sounds exacerbated on sections of bad pavement. Not too bad though. Brakes squeaked mildly throughout. Shifter smoothed out after the car warmed up. In a few years who knows where this car will be.
The more forgiving sidewall on the 19 inchers helps. Will see how much the structure loosens up after this winter. Not as tight as I thought it would be but hey, it is a sports car.

 

Window seals always rattle a bit with expansion/contraction in cold weather. Cars are built to handle cold weather - it's normal and your car will be fine!