I'd like to see a GPS enabled LifeAlert/panic button/Fob type device that allows sales people to alert the store of an emergency during a test drive.
Years ago one of my co-workers was held up at gun point on a test drive. They took his clothes, phone, wallet etc and left him on the side of the road wearing only shoes and underwear. The guys laughs about it now, but at the time we had no way of knowing where he was nor did we know he was missing. He was eventual picked up by the police. (They thought he was a drunk, because he was jumping up and down on the side of the highway, yelling at cars as they drove by.)