Dealers use a fancy catalog program called "ETKA" to pick out and order parts...ETKA looks something like this:
It provides one with an exploded drawing and a list of part numbers that correspond to the parts pictured...very useful. But what if you need something from the dealer, but don't want to go to the dealer and get ripped off on it...or you just need to look up what a certain part is by its part number? Let's assume you can't get a hold of a copy of ETKA.
Fortunately, there's a free website that is pretty much just like ETKA, except the drawings are a bit lower quality: www.vagcat.com
To view drawings you will, however, need to login. I've registered an account that all of you may use:
With this you can view drawings and pick out the parts you need.
When you're ready to order parts, go to genuinevwaudiparts.com. Apparently, these guys order parts through a dealer (Miramar VW/Audi, going by how their email is email@example.com and their stuff ships from California) but sell it to you for less than a dealer would. I've ordered parts through them before and have been happy with my purchases.