As your car is an 04, it will be easy to do with Vag-Commander. What is the part number of the R32 Clocks? if they end 960, 970, 961, 971, 962 & 972
Then Darren (MortyGTtdi) will be the man to see.
If they end with 3 or 4 then you will need to send them of to a company like shark performance for them to read the pin and reset the mileage