It's just clearing for take off. With mine it does that but on the MFI you see wings project from the doors. Next time it happens, floor the pedal when you merge and you'll see what I mean.
Better check the owner's manual for wing release procedure.A veteran clubtouareg member reported this Touareg icon popping out of nowhere thing on his V6TDI a few months ago. Everyone was stumped if I recall correctly. Too bad it's not listed when you scroll down to the bottom of this page. I suggest you try and find out who it was, and compare notes with him. The thread might have even been updated with a logical explaination.