B6 Audi A4, how can one tell if it is equipped with a CVT Transmission?

I've been doing some googleing and I read that only the I4 FWD ones have it, but I want to be sure. I hear that the CVT is prone to failure so I want to avoid those. Does the CVT look different than a regular automatic? I've been looking at used cars online and the pictures that Ive seen for automatic 1.8T AWD A4s have the gear shifter/knob with a slot to the side with a + and - for you to shift manually. Isn't this what the CVT does, and so shouldn't it just be on the FWD models? So I really just want to know how to identify a CVT so I can avoid them. Thanks.