Check Ross-Tech on Youtube , they make some of the test system for these cars .
Then there are lots of others , some better / or worse than others .
This is my 1st go around with these car & systems and just getting familiar with .
I was in the bis some yrs. ago and was working when they 1st started putting computers & emissions in cars / trucks , even did smog testing in no. CA , had OTC , Snap On & others test gear , so gives a little head start .
I have the Ross-Tech KII-USB and downloaded the manual from Ross-Techs site .
Get familiar the manual for your gear , watch a few videos maybe multiple times , and then connect you Vagcom its easy once you get some understanding & watch it done a few times .
Tools required 22mm wrench [ I used a ratchet ] and 13mm socket & ratchet .
Look for lots of different YouTube videos , most are almost useless , a few are good .
Here's Ross tech's video ,