I found this and its only the last 6 digets.
I fould some cool stuff here.
Quick Audi (B5) S4 FAQ:
Q: What are some differences between B5 platform Audi S4 build dates?
A: Audi seems to roll out updates gradually on their cars, so no list may be totally accurate. For example, you may have a M-box with the older shifter stalk. Also note that S4s were released in Europe before North America.
09/99 (Y2000 initial production, A-box ECU for manual, f-hose, possibly aluminium uprights on suspension, original badge)
06/00 (Y2001, H-box ECU for manual, ESP controller, possibly steel uprights)
10/00 (Y2001.5, M-box ECU for manual, revised turbos, no f-hose, revised TBB, different oil inlet lines, possibly changed shifter stalk, polished aluminum mirrors w/ sport package, new badge, Avant model)
06/01 (Y2002, T-box ECU for manual)
Tiptronics have a different lettering sequence for their ECUs.
Q: How do I tell what ECU box I have?
A: The best way to be sure about which box you have is to either a) look at the label on your ECU
or b) hook up a VAG tool and see what number it returns. For example, a reading of 551M would mean M-box (for both methods).
Q: What does my VIN mean?
A: Meanings by digit: 1) W = Germany, 2) A = Audi, 3) U = Passenger Car, 4) Series: R, 5) Engine D, 6) Restraint System, 7&8) Model Number (8D = A4/S4), 9) Check Digit, 10) Model Year (Y = 2000, 1 = 2001, 2 = 2002), 11) Assembly Plant, 12-17) Serial Number