this feature assumes the driver will only want to open the top portion of the tailgate (it is still a two-piece design) for loading or unloading groceries or other items that don't require having to open the bottom portion...

not sure if there is a sensor for detecting an open bottom in cases where you forgot to close it and are auto closing the top.

it'll probably just close (but not lock) and just ignore the open bottom!

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2012 X5 50i M-Sport
2014 X3 35i M-Sport