I checked the model guide at AudiWorld. The first year the 2.7t engine was used in an a6 was the year 2000. You state you have a 1999.
more from Audiportal Below..
Bookmark article at:These icons link to social bookmarking sites where readers can share and discover new web pages. powered by moSociable 1.0.1 by www.waltercedric.com