I know how it feels... went thru the same thing with my prior car. It was MIA for 2 weeks !

The bottom line - you will get it. It can not be sold to anyone else (if you are worrying the dealer will pull bait-n-switch on you) as you have the VIN number and can potentially track it thru the DMV and other agencies.

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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