Those are aftermarket tailight on the A6... Talk about tints...in NY some people double tint the windows, to the extent where you can't see inside even if the car was outside in the sun and had a white/tan interior...it's crazy if you ask me... Just two weeks ago a guy came to pick up his Black G35 from my friend's detailing shop, and said that the limo tints on the car were a bit too light (and the windshield was tinted 20% w/ a black interior)...lol...come to find out, he was a corrections officer, so I guess that means he won't get a ticket...