Frodo says that VW have just changed their opinion:
GOLF mkIV is now recommended to make the change at 4 years or 60k miles. Sounds like a sensible recommendation and Update to that generic Service Book schedule.
At last they are now agreeing with Technicians that I have consulted. Manufacturers generally imply term maintenance costs at the minimum, in order to attract the attention of Lease / maintenance companies, selling a total package to Fleets and the like.
If you OWN the car yourselfÂÂÂ

, and you have a sporting driving style, it is different:-
For the Turbo cars, go with the 1st change a little earlier and before 50k or 4 years. If you suspect real heavy driving from a previous owner, or find maintenance to be poor - discs worn out early, tyres all worn at edges, black oil etcetera - Have it changed at 40k miles or so.
Believe me. You won't be sorry

, and you can drive harder with more confidence.