Start up rattle !! Is this vanos or something worse ??

[Webbie]

Hey every one owned my little x5 4.4i m62 with vanos for just over a year and love the old girl but it has a very strange rattle on start up it hasn't gotten worse or better its stayed the same I'm just wondering if anyone can point me in the right direction or if this is the vanos rattle that they all seem to have ?? The part that gets me is its intermittent!!! One morning it will rattle the next it wont I have tried to attach a video file of the sound but it wont let me maybe I can email it anyone who's willing to help ??
Thank you to everyone for your help!!