These are OEM tires on my ML350 BlueTec with 20in AMG rims.
After 24,000 miles they are completely worthless in even and inch
of snow/slush. Up to 10,000 miles they performed reasonably well in
the snow with dramatic reduction in traction as the miles added up.
I'm going to buy another set of rims and dedicated winter tires, I
might get one more summer out...