So my 2006 A4 and My 2008 BMW both call out a 2-year change interval on the brake fluid. Both came with scheduled maintenance for the first 4 years, although Audi now charges extra for this service (since 2007), which is odd, since the down-market VW brand still carries it for 3 years (?!!??). Interestingly, the change interval on the VW (2010 Golf TDI) is 3 years! Have something to do with the factory maintenance being 3 years or just better fluid? Hmmm.... Last time a changed the Audi, the fluid was so clear, I couldn't tell when the old was out and the new was in. Super blue next time.