In my experience the biggest problem with the "snow mound parking spot" situation has been ground clearance. I run blizzaks and haven't had any traction issues, but I don't go for spots where my side skirts are going to get jacked by ice. I'm sure AWD would help winter parking in general, but it isnt going to make a 3 series into an explorer.
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E90 M3 Space/Fox/6MT
E92 335i BSM/Saddle/6MT - Sold
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