BMW Assist
Last night after mountain biking I dropped my key fob in my trunk, then closed the trunk, the problem was the car was still locked. My car came with BMW Assist, so I gave them a call and asked them to remotely unlock my car. They ran through a series of security questions, then sent a signal to my car. A few minutes later, my drivers side door unlocked, and I could pop the trunk to get my key. That is an awesome feature.