List of codes for VAG-COM

The FAQ at Ross-Tech's site states the following:
"Since the above Bentley Factory information only applies to US/Canadian
vehicles, if your car is European-spec or from the rest of the World, they may be of little use to you."
They mention the erwin-portal but the pricing for this is ridicilous. Is there any other useful litterature avilable for European-spec Audi's? Is there a list over various fault codes and measuring blocks?
Jone T.
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