This mounts on top of the rear deck. It's the whole light assembly w/ bulb. All you do is screw it back down to the rear deck and plug in the 3rd brake light cable. I took mine off because I put a spoiler on with an integrated 3rd brake light.

Note, the color is charcole gray. Came off my 2001 A4.

$25 flat (includes shipping)

skyy99_1111 [AT] yahoo [DOT] com

Thanks
Matt