To know for sure which transmission your specific 2001 Audi A6 has, you can:
* Check the owner's manual: This will clearly specify the transmission type.
* Look at the gear shift lever: A manual transmission will have a gear stick with 5 distinct gears, while an automatic will have a lever with "P," "R," "N," "D," and potentially "S" or "M" positions.
* Check the VIN: You can use the VIN to look up the vehicle's specifications online, including the transmission type.
Let me know if you need further assistance.