After you unlock the car, and open drivers dor the splash will show, if you make a short stop it wont show, if you open other dor then drivers first i think it wont show not sure, but i think someone said that.
Since your screen is motorized, if you dont turn the ignition on fast after you enter the car you can miss the splash...
Let me state that i dont have X3 and i suppose this is the deal since that is how it works on X5 E46 E39