The idle on an x5 doesn't go up much when cold. If the light is flashing and it idles rough probably detecting misfire.

__________________
04 X5 4.8is
76 2002

X-Pipe and Dinan Mufflers: www.youtube.com/watch?v=eWQh-izaTcY

Pics http://www.flickr.com/photos/stevenb...7607968312734/