Hi everyone I have an 2000 Audi A6 2.8L. I just drove it this morning only to find out that my tiptronic won't work and the auto transmission won't engage to the 5 gear. The LED display that indicates which gear the car is in, which normally indicates this by inverting the display of the selected drive, wouldn't show ANY gear as selected .:(:(

Hope you found the answer by now, but if not, here goes. Your tranny is operating in full hydraulic mode -- gears one through four mitout any electronic override -- because something electrical is broke. When my '99 did the same, diagnostics pulled a code that indicated a fried multi-function switch. I changed it myself to save $400 on labor, but it's no picnic. :)