I also bought an OEM 18" spare tire that I toss in my trunk for long, out of town trips. I don't trust BMW assist so I just kept my AAA membership active. All you need is a cell phone and hopefully be in an area where there's signal.

Whatever people might say, having a flat tire on those run flats 200 miles away from the nearest BMW dealer can ruin a vacation. How many mom and pops tire shops will actuall carry wheels and tires for an E70?

Losing cargo space is better than having your E70 towed in the middle of your trip.

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2007 E70 3.0