They are a straight swap out of the box and everything will function and no errors will show on the dash of you are fitting genuine VW H7 headlights and according to the people selling them shouldn’t show any errors if you are using aftermarket H7 headlights
Then there’s the optional coding part, your original headlights by default will turn off low beam when high beam is selected (this is because your original H4 headlights have both high and low beam headlight within one lamp and would overheat if both lit at the same time) with the H7 headlights you have two separate lamps within two separate reflectors in the headlight and if factory fitted by default the low beam will stay on when high beam is selected, this can be changed by a basic bit of coding with VCDS but is optional and not required to make the swap to H7 headlights