A LSD diff should help also. Our 190e 2.6 can spin the
back wheels in rain I can only imagine that snow would
be a disaster to drive in. IMHO MB's are a high end car
and LSD diff should have been standard feature.
A Subaru AWD is a better snow car than you MB will be
with snow tires+ LSD.
91 190E 2.6
73 bmw 2002
96 Subaru Outback