Had my Glacier White A3 8V S-Line for a few months now.

The 1st time I washed the car I noticed that there was a very faint line (barely visable to the eye) running from the front headlights along the body of the car.
To me it looks like residue left from any covers / protectors that are applied by Audi to the car for shipping.
I have washed the car many times and the faint line is still there.
It's not a big deal.
I was just wondering if anyone else has noticed this? And if so did it eventially disapear?