How to diagnose issues with Audi A6 transmission?

I recently noticed some inconsistency with the shifting of gears in my Audi A6. How can I accurately diagnose any potential transmission issues without going to a mechanic immediately?

First, check the transmission fluid level and condition. Low or dirty fluid can cause shifting problems. If that is not the issue, try resetting the transmission's adaptive learning by disconnecting the battery for 30 minutes.

Another possible cause could be a faulty solenoid or sensor. You can use a OBD2 scanner to check for any error codes and pinpoint the specific issue. Then you can decide if it's something you can fix yourself or if it requires a trip to the mechanic.