With CA, you can only unlock the car by pressing on the door's handle, but continue pressing on it will NOT open the windows.

A common problem is when people lock the car, put the key in the pocket and walk away. While still close to the car, something in the pocket can press and hold the unlock button leading to unlocking the car and lowering the windows.

I never put the keys in my pocket until I am sufficiently far away... I had similar problems in the past with my others which did not even have CA feature - it was always accidental press on the buttons. Get yourself that BMW leather key holder, it will protect it from accidental presses !

http://www.bmw-online.com/ProductDetail.aspx?p=2345

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His : 2013 X5 3.5d Deep Sea Blue/Black/Aluminum with ALL packages, 20" 214"s, running boards, Adaptive Drive, Spare Tire, BMW Apps
On Order : 2016 X3 3.5 MSport Silver/Mocha with DHP, CW, Prem, Tech, DA, Lighting

Hers : 2015 328xi MSport Silver/Red

Prior:
2008 X5 4.8
2011 X5 3.5d
2010 335 xDrive
2013 335 xDrive