2012 Audi A6 was officially launched at Detroit Auto Show. Lengthen version for Chinese market was already spotted out:
http://news.bitauto.com/xinche/20110120/1205282509.html

http://image.bitautoimg.com/hlimg/2011/0120/57/7954179058254578641.jpg
http://image.bitautoimg.com/hlimg/2011/0120/18/13812787402460000694.jpg
http://image.bitautoimg.com/hlimg/2011/0120/83/6962849557401229507.jpg

European version:
http://www.autoblog.nl/archive/2010/11/30/primeur-de-nieuwe-audi-a6
http://www.worldcarfans.com/210120129833/2011-audi-a6


http://www.autoblog.nl/gallery/Audi/A6_2011_lek/slides/audi_a6_2011_02.jpg
http://www.autoblog.nl/gallery/Audi/A6_2011_lek/slides/audi_a6_2011_03.jpg
http://www.autoblog.nl/gallery/Audi/A6_2011_lek/slides/audi_a6_2011_11.jpg

http://s2.mojalbum.com/avto7-foto_4219952_17450250_18727169.jpg
http://s2.mojalbum.com/avto7-foto_4219952_17450250_18727168.jpg

http://www.che168.com/article/356123_1.html


edited on May 26th
New pics and info:
http://www.che168.com/article/360206_1.html?from_2_title

http://s2.mojalbum.com/4219952_17521675_19456155/avt015/19456155.jpg

http://s2.mojalbum.com/4219952_17521675_19456156/avt015/19456156.jpg

http://s2.mojalbum.com/4219952_17521675_19456157/avt015/19456157.jpg


http://www.autohome.com.cn/news/201202/298894.html

Presentation of new A6L:
http://www.autohome.com.cn/tech/201203/302232.html


A6 30 FSI powered by 2.5 FSI engine:
http://s2.mojalbum.com/4219952_17532116_19499881/avt016/19499881.jpg

http://s2.mojalbum.com/4219952_17532116_19499880/avt016/19499880.jpg

http://s2.mojalbum.com/4219952_17532116_19499870/avt016/19499870.jpg

http://s2.mojalbum.com/4219952_17532116_19499879/avt016/19499879.jpg

http://car.autohome.com.cn/photo/12203/12/1476867.html
http://car.autohome.com.cn/photo/12203/12/1476874.html
http://car.autohome.com.cn/photo/12203/14/1468370.html

http://s2.mojalbum.com/4219952_17532116_19499871/avt016/19499871.jpg

http://s2.mojalbum.com/4219952_17532116_19499878/avt016/19499878.jpg

http://s2.mojalbum.com/4219952_17532116_19499875/avt016/19499875.jpg

http://s2.mojalbum.com/4219952_17532116_19499876/avt016/19499876.jpg

http://car.autohome.com.cn/photo/12203/10/1476986.html
http://car.autohome.com.cn/photo/12203/10/1476990.html
http://car.autohome.com.cn/photo/12203/10/1476976.html

http://s2.mojalbum.com/4219952_17532116_19499877/avt016/19499877.jpg

http://s2.mojalbum.com/4219952_17532116_19499874/avt016/19499874.jpg

http://s2.mojalbum.com/4219952_17532116_19499873/avt016/19499873.jpg

http://s2.mojalbum.com/4219952_17532116_19499872/avt016/19499872.jpg


more at:
http://car.autohome.com.cn/pic/series-s12203/18.html?pvareaid=100496
http://car.autohome.com.cn/pic/series/18.html

A6L 50 TFSI quattro:
http://car.autohome.com.cn/pic/series-s12268/18.html?pvareaid=100496
http://photo.bitauto.com/model/16355/


http://s2.mojalbum.com/4219952_17540501_19560450/avt017/19560450.jpg

http://s2.mojalbum.com/4219952_17540501_19560449/avt017/19560449.jpg

http://s2.mojalbum.com/4219952_17540501_19560451/avt017/19560451.jpg

http://s2.mojalbum.com/4219952_17540501_19560448/avt017/19560448.jpg

http://car.autohome.com.cn/photo/12268/1/1493922.html
http://car.autohome.com.cn/photo/12268/12/1493985.html
http://car.autohome.com.cn/photo/12268/12/1493982.html
http://car.autohome.com.cn/photo/12268/12/1493978.html
http://car.autohome.com.cn/photo/12268/12/1493940.html

http://s2.mojalbum.com/4219952_17540501_19560447/avt017/19560447.jpg

http://s2.mojalbum.com/4219952_17540501_19560453/avt017/19560453.jpg

http://s2.mojalbum.com/4219952_17540501_19560452/avt017/19560452.jpg

http://s2.mojalbum.com/4219952_17540501_19560454/avt017/19560454.jpg


Prices:
http://www.autohome.com.cn/news/201203/312760.html
http://auto.sohu.com/20120327/n338831259.shtml
http://www.bitauto.com/zhuanti/newcar/a6l/