The Side-view Cameras are what the fifth button at the right end of the stack operates. I have them, but have a hard time getting any distance perspective about what they are seeing. They just give you a head's up when peeking around a corner. Nice goo-gah though.

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DeanLinAZ
2011 X5 35i, Sport Activity
Black Sapphire/Oyster
M Sport, Tech & Conven packs
Premium sound, Side camera opt