On my 2008 all white lights go off - only the orange lights stay on while the vehicle is in motion at night.

Don't know why the 2010 would be any different especially sense it could be considered a hazard during night driving.

Maybe a programming glitch.

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Current - 2010 X5 35d
Retired - 2008 X5 3.0
Retired - 2007 X5 3.0
Retired - 2006 325 3.0