There has been some talk in here about not having a TDI option. I dont know if anyone else has seen it but in the Technology section on Audis site it shows a cut away of a motor with what clearly is a front mount IC and plumbing.<ul><li><a href="http://www.audiusa.com/audi/us/en2/new_cars/A5/a5/technology.html">Click it</a></li></ul>

but nothing new there.... The fact that the Q7 can be had with the 3.0 TDI motor is encouraging.