Travelor

When I take my 2012 GS A6 in for an oil change I stay with the car and do a visual inspection when the car is on the lift. Each time I do this I see a very light oil residue at the rear of the drive shaft tunnel when it connects to the transmission. I have spoken with the Service Manager and he is aware of this but recommended not pulling the transmission out for this very slight oil leak (it has never been enough to result in drops under the car in my garage) UNTIL I get close to the end of the warranty and then repairing it.

Anyone else have this problem?