Just checked out the link, looks good, thinking of getting the smoke coloured ones, have you bought them yet?
These smoked ones? Back Rear Tail Lights for Audi A4 B6 (Avant, 09/01-10/04), with LED, in smoke Buy Online
or these.....Back Rear Tail Lights for Audi A4 B6 (Avant, 09/01-10/04), with LED, in red-blac | eBay
... not bought any as I want to see if they fit, what the quality is like and how they look when lights are on?
Going by the description they won't fit as my avant has one reverse light and one fog light built in.
Chris "the machine" Green.
2004 Audi A4 1.9tdi Sport Quattro Avant