You are going to need triple square impact sockets for VW and Audi. I would also get a couple chromes that you can knock out of the socket and buy the double box end that will fit on the bit to be able to hit it with a hammer. It was the only way I was able to get my rear caliper mounting brackets off to get to my rotor.
Another thing is a lot of the reg obd tools have issues with the german cars and I do mean a lot. So think about that before you get a generic reader. They are either about to or just came out with a new software program for the dealers. Though most people were using http://www.ross-tech.com/vag-com/ in dealerships before that as it worked so much better then the stock scan tools lol.
Be aware all german cars are plagued with electrical issues. Especially VW I mean holy hell they wrapped my wires for the washer spray nozzles directly to the piping for the washer fluid no loom no nothing just a lot of electrical tape. They are pretty easy to work on as long as you have a lift.
Be aware of bolts that look almost like aluminum. They are a composite material and don’t just like to strip out they loooooooovvvvvvveeeeee it. Also make sure you are all the way seated with the triple squares or you will hate life and will be buying a drill doctor. You are also going to need some pretty big allens for drain pans for transmissions but, wait till you get there to get sizes. I needed a 50mm (Not positive if it was that or more) L-Key to get the drain bolt out of my trans which ironically cannot be filled from the fill port on the side without a special machine.
They also have a love affair with torx fasteners. Here’s a torx, there’s a torx every where a torx torx oh wait thats a triple square crap and I rounded it. You need torx bits just to drop the skid plates under the cars. They also tend to have the metal clips break in them and get jammed up because people just love to use impacts on t-25s no I don’t know why.
Be aware the plastic for the intake boxes/plenums is a soft plastic easily broken if you use an air ratchet so be mindful. That and almost every TDI that comes in if you remove he valve cover will gift you with several hours of work at least for the BRM motors which was in the 2005.5 Jettas at least.
The windows require factory wiper blades or it will scratch the outer surface. This is not bs if you look at my windshield it will confirm it. Also the lenses for the lights fog up real good on them. So those are some things to look for.
And that’s about all there is to say about that.