First things first, you have to have the automatic starter (not sure of the name) on your car, in other words, do you have to keep pushing the key to start the car, or do you just click all the way and leave the rest to the car to start up? in case you have the automatic starter (the later), then you need to have the NAV and the code option. I remember that it has been said that if you turn the key to on (without continuing to start the car) and then you enter the code, once you press ok the engine will start...

since we're talking about push buttons, try the search button, i'm sure you'll find detailed threads....

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BMW X5 3.0si 2008
Premium Package
Light Package
Navigation
Reverse Camera
Rear Sensor (retro-fit)
Comfort Access
Spare Wheel
Power folding mirrors
Voice Control w Bluetooth
Power trunklid

BMW X3 3.0i 2006
M Aerokit
M Sport Package
Navigation System
BT Handsfree
Xenon HID

BMW X5 3.0i 2001 --- SOLD