i recently purchased a new 2017 A6 3.0t Quattro premium plus. I followed the owners Manuel for proper break in and once I hit 1,000 miles, I thought i would see what it could really do. Seemed a little slower than I expended so I though I would clock the 0-60 time. Every time I keep getting 5.5 seconds. Several sources claimed they were able to hit 4.6. Now I understand I'm using a timer so there is probably a few tenths of second difference in my response and accuracy, but still. Any thoughts or suggestions?