My current M3 is the 5th BMW I've own to date. And one thing that I've learned (which has been very scary) is that winter and fast z rated rear wheel tires don't mix well. A few 360 turns in every BMW( 320i, 325i, 525i and 740i sport) that I own in the past, except my new
M3 taught me a lesson not to drive it during the winter months. Also, when I purchased my M3, I ordered Xpel Clear Bra protection for the full front bumper and sides, the hood, mirrors and wheel arches. It's the best money spend against having the car being peppered, pidded from road rocks, intects, etc.
Spring will come soon enough.