I just bought a (used) '98 A6 Quattro (2.. It came with the "Owners
Manual" but that does not contain any information on regularly scheduled
maintenance.

Where can I get the mileages at which various regularly scheduled
maintenence actions should be performed? Such as replacing fluids, plugs,
belts, and inspecting things like differentials, CV joints, wheel bearings,
etc.

Thanks.