It is a pain in the butt; just do what Mike says. You do need to grab the sides and pull hard. I had to open mines so many times; like dirt, dust, and finger prints found after I closed them. Bummer is that I got some on unwanted glue and need to open it again. Grrrr.
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2004 X5 4.4i
Titanium Silver on Black - Sports - Premium - Cold Weather - Rear Climate - Heated Rear Seats - Navigation - DSP - Ajustable Ride Height - /// M Sports Steering Wheel - ///M Racing Pedals - 4.8is Body Kit and Tail Pipes - Panorama Moonroof - Bluetooth® Wireless - 2006 Instrument Cluster - Intravee II - OEM 20" 168's with Diamaris