Hi guys, I got a 2005 A4 CVT wagon and having the following issues.

I noticed that when I am driving the transmission would go from D to S for about a minute then stop doing it.

It also seems that sometimes the vehicle would not answer even if I give it more gas, it would not accelerate.

Last thing sometimes I would need to put it on reverse a couple times before it picks it up. Any idea? Am I looking a a new transmission of some type of computer work?

Thanks

Max