**Warning: your "Key not in the car" warning is inop, according to telcon with Tesla Owner Support a few minutes ago.** Here's what happened to us this morning. I placed my wife's purse (with her MS key; she's the primary driver) in car, along with her luggage, for the drive to the airport. Dropped her at curb to run in first (we were late), after which I parked the car some distance away in the parking garage, planning to send her off at the gate later (I work there; TSA isn't an issue). We did NOT realize she had the ONLY key to the car, yet the car did not, to my knowledge, advise me in any way that the only key in proximity had left the car. Only after I'd parked and was about to close the door did I search for "my" key--that would be the one I'd left at home sitting on the counter. Our MS was effectively inoperative without a key, ONCE PARKED. Imagine if I'd just dropped her off and then stopped for an errand on the way home . . . . With her key en route to Europe or Asia or _______, and me with the only other key sitting at home, this would have been a major problem. Fortunately, I ran into airport and caught her in the TSA Security and got the key back from her. Not good! Called Tesla a few minutes ago and they advised me, "that due to too many false 'key not in car' warnings, such as while driving (I've had them too), they've temporarily disabled the 'key not in car' warning system while coming up with a better solution." In the interim, this is, IMHO, very important for us to know! There are smarter software and phone app solutions for this; let's hope Tesla comes up with some quickly. In the interim, be sure to do a "key check" if you're a Tesla sharing family as something like this might come up and really ruin your day . . . .