According to the BMW dealership (2 of them)...only the X5 does this. It cannot be disabled, and it seems that a lot of E70 owners hate this "feature". If I turn my climate control off, I expect it to stay off. Crap design!! It will stay off, if the engine stop & start are within about 30 mins. After that, the climate control will turn itself on automatically upon the next engine start. Hate this, really!!