What do I need?

Hello!

I'm brand new here and I'm not very familiar with all the diagnostic stuff yet.
I recently bought an Audi A3 8P, and I've heard that you can adjust certain parameters using VAG-COM. http://wiki.ross-tech.com/wiki/index.php)
What do I need for that, and where can I get it? Or is there perhaps someone in the Braunschweig area who knows about this and would be willing to meet with me to help adjust a few things? I think this whole thing isn't exactly cheap, right?

Have you ever clicked on the "Shop" button at the top of this page and taken a look?

Regards,
Sure.

Here is the translation of the text from German to English:

"Guste" means "gust" in English. It can also be used as a verb, meaning "to gust."

Hello,

For your model specifically, this would be sufficient.
http://shop.dieselschrauber.de/product_info.php/cPath/21/products_id/221

Best regards, Rainer.

Thank you for the help; it's quite expensive to make even small changes.
Is there perhaps someone in the Braunschweig area who owns something like that and would let me use it for a fee, or maybe someone who could do it for me?