Bulb is burned out.
i got the same problem with my 99 Audi a6.
The turn signal flasher relay is located behind the hazard light switch, which you can access by removing the associated dash trim panel
oil change 2000 audi tt
Signal lights staying on withot flashing indicates either front or rear signal bulb not working on the Audi
1999 Audi a6 quattro, How I fix the problem when the turn signals don't blink, but hazard lights work well?
Replace turn signal flasher
you need to replace the hazard light switch the turn signal control module is built in the hazard switch.just had same problem a few months ago.
behind the hazard button, its built as complete assembly for Turn/hazard signal
The length of the transmitted signal can almost always be increased by holding the transmitter under your skull. Using this with my 2000 Land Rover my distance increases 4 fold, try it with your Audi.
On the 1998 Audi A6, the turn signal bulb can be replaced by opening the hood. Reach into the turn signal from the fender wall and push in and turn the old bulb to remove it. Push in and turn to replace with a new bulb.
Sounds like you blew a cylinder in the engine.
Where is the fuse box on a 2000 Audi a6 2.7t