All, I do apologize if this is a common thread, I searched but couldn't find the answer.

I just purchased a 2011 A4 2.0T 8spd with the regular Audi Concert stereo. I noticed the plug in the glove compartment and I'm guessing I need an interface cable.
I did some searches on Ebay and Amazon and I'm finding there are different styles of plugs....

I'm pretty sure just the aux connector to plug into my phone will work.

Which one do I get??

Thank you in advance.

Drew