Just some items for consideration for the 2004 model, if it is the manual version check to see has it "Brake assist", the earlier versions in that year did not come with it, but were upgrade free by VW. Reason its a safety issue as its is difficult to use the park brake to hold the car on an incline
Ensure that it is loaded with the latest version of the engine software, again software versions loaded in 2004/2005 caused engine roughness at 50/60 MPH.
If you have access to vagcom run a diagnostic, it will give a readout of all bus controller errors.
Tyre wear, lots of comments here on that subject, expect to replace every 12 to 18k, however again dependant on how you drive, manual/auto, tyre compound and those stepper motors. Drive the treg in a tight circle, both ways, and if you hear/feel clunking, its expensive to repair.
Last item, check aircon, it may need a gas recharge/maintenance.