I use AAA and have had it for years. In addition to roadside assistance, towing, jump starting, etc., you get discounts at some stores, restaurants, hotels, and other member benefits. It also covers any vehicle you are using, even if it's a rental or you are riding with a friend.

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'06 X5 4.8is, TiAg/black, cold weather pkg., comfort seats
'07 750Li, TiAg/black, sport pkg.
'05 Ford F350 silver met./slate gray, Lariat, 6.0 PSD, CC, DRW, FX4