Got a tip several years ago from my mechanic, and it works like a charm for my own 82 240D sedan in snow....I have LOTS of snow/ice in NW Connecticut during winters......

Go to local Agway Store and purchase several (2-3) 70LB sand tubes and place them in your trunks up against back end of trunk....this will significantly IMPROVE driving in snow/ice for these cars that have a tendency to fishtail on the backend because of lack of weight in the rear.....

WORKS LIKE A CHARM....for about $20-$30 investment OR get some sand bags and fill em with sand yourself and put into trunk of car but if bags break, it can get very messy (like your bathing trunks at the beach!)....