Hi,
Not sure what they call them in Volkswagen world,
but in Mazda and Nissan they have bulletins for superseded parts/ service methods etc,
in house recalls etc of parts that should be updated when car is serviced under warranty,

I cant find mention of this type of thing on here (except for a mention of a updated air separation tank / coolant reservoir), and wonder if its got a different name

anyone know what i am talking about?

cheers