Old MB's are not that great in the snow, they are not a fwd car. My SDL has new all season tires and it is ok, snow tires are needed though. Also it doesn't have an lsd so traction is only going to be so good. If I were looking for a MB to go skiing with I would chose a newer one with a limited slip and traction control. A W210 wagon would probably be a good choice. My SDL does ok in 2-3 inch of unplowed snow, more then that and well... Also they don't do hills unless you get a running start, think slightly better then a 2wd version of your truck with nothing in the bed.

__________________
2006 CL500
2009 C300 4matic
1969 280SE
2023 Ram 1500
2007 Tiara 3200