For the last weeks (at least) I've been unable to wake my MS from sleep mode using the iPhone app, no matter how long I wait. The app works just fine when the car is awake. The problem is independent of location, ie I can't wake it when its connected to wifi at home or 3G at the office. I got 5.11 yesterday and the problem persists. As far as I recollect, the app used to always wake my MS from sleep mode - it just took a while. I could happily preheat my car in the winter, but jow that the weather is warm I can't pre-cool it. I asked my local service centre today and the reply I got was that the app cannot wake the MS from sleep mode... I quote: "The connection with the app is not working because the Model S is on Energy saving ON. If you switch if off, it will work again." Is this new behaviour? Or what? BTW, I searched the forums with Tapatalk, but didn't find anything specifically on this subject. Rob.