Just ordered Falken Eurowinter HS-439 for my CLK 500 from Mytyres....hope that they will do as well as kit17's Nankangs (kept original tyre size, that why I went for the Falkens.....very few to choose in 255/35 R18 size)...this is my wifes car and, like Kit17 she has a cross country drive to work along roads that are barely being gritted at the moment...running 225/45/17 Vredestine Quatrac 3 on my C270....great in snow!