The W201 chassis is not the optium car for snow use. It's a little light in the back end, and has an open final drive and no traction control.
I had pretty good success with 190E's in winter conditions by using high quality snow tires and a little weight in the trunk, as close to the back seat as possible.
Don't make the goof of putting a bunch of sandbags in the trunk. This radically changes the weight distribution, and can cause trailing throttle oversteer in a big way. I found only 20-30lbs right at the front of the trunk (close to the back seat) worked to add a little balance, and with good snow tires, the car got around pretty good.
1998 C230 "Black Betty"