Go to Walmart and buy some of the 5w-40 Mobil I Delvac, Yellow cap. Or you could try some of the 0w-40 Mobil 1, I think MB aprove's it for your car.
I would really like not to drive my car this winter but it looks like I won't have the $$$ for a beater this winter.
Maybe next year.
I doubt this car will be good in the snow, no posi, rear wheel drive, and a turbo to mess you up. It should be a lot of fun this year, not to mention I live on a steep hill.