C32 here - I used my winter mode today in the rain. First time I've ever used it, and maybe a glimpse into why MB made it the way they did. Almost undrivable in the rain in sport mode with the sprint booster - the esp was constantly kicking in.

I bet even w mode in the snow would be a pain in the ***. I drove it last winter (with snows it was drivable in w mode), storing it this year.