I cannot leave the dog in my 320d Touring! The handbook instruction is to press the lock button twice on the key fob to lock the car with internal sensor off. I've tried pressing twice with varying lengths of time between the presses, but it rarely works. Nor do I get the acknowledgement from the lights. What's going on, is there some sort of skill required for this button pressing? My dog's getting embarrassed by people staring at the car!