keep experimenting with slaming the doors with the windows down.... do some 5-10 big slams, then go buy window regulators ...

seriously now, avoid slaming the doors with windows open, it will leave you with a broken window regulator

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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