317 vehicles are being recalled because the seam in the side curtain air bag may not have been stitched correctly. As a result, the side curtain air bag may not deploy as expected. Failure of the air bag increases the risk of injury in the event of a crash. Dealers will replace the left and/or right curtain air bag to correct this concern.
Recalls
Recalls are issued for cars with safety-related defects or problems
2012 Audi A6
Side Curtain Air Bag May Not Deploy As Designed
Body, Interior & Misc., December 5, 2011