Like any other rwd vehicle, put some weight into the trunk and rest it in front of the rear axle. (not in the back of the trunk) This will help with traction.
This will my my first "M-B Winter" so I'm working through some of the same issues. For the past 17 years we've been driving toyota products and fwd has been acceptable. So this will take some getting used to.
(Though I grew up in Wisconsin and am used to snow, some of the Ohio drivers get pretty stupid on slick or snow-covered roads and that first overpass on Ohio 33 crossing Ohio 36 on the east side of Marysville can be a prety slick spot even for front wheel drive.)
Personally, I think an E body would be a better choice for snow and ice.
Collin (Just be certain that the heater works) KC8TKA E320/97