How do I fix my Audi's faulty transmission?

I've been having some issues with my Audi's automatic transmission, where it is not shifting gears smoothly. It also makes a strange noise when I try to accelerate. What could be the cause of this issue and how can I fix it?

It is possible that the transmission fluid is low or dirty, which could be causing these problems. Check your fluid levels and replace or refill as necessary. If that doesn't resolve the issue, it could be a problem with the transmission's solenoid or sensors. It's best to take it to a mechanic for a thorough diagnosis.