engine noise at cold startup

[Mfan225]

on cold days, when i start up my 2006 330ci, you hear a clicking sound for about 10 to 20 seconds. any idea of waht could be causing this to happen?

 

[Tom]

Is your A/C or Defrost running when you hear the clicking noise?

 

[Wallaby]

Obviously still under warranty - take it in