Just back from a Euro trip with the 1.9 TDi avant and filing a little report on the audi!
We covered 3k miles in 2 weeks (well more like 3 days driving, the rest of the time the car was barely used). It's just turned 160k miles and still feels tight as a nut (I did have to pray that I done the cambelt change correctly on the day before I left, but all seems well). The only thing about the car that shows its age is the appearance of rust at the front of the wheel arch, so I'll be sorting that out shortly.
We went from Newcastle-Holland-Germany-Poland-Czech Republic and back with our dog, camping equipment, wedding dress, 2x kilt outfits, and a stopover in Germany to buy lots of booze for our wedding. It took it all well and didn't lose much mpg with all the kit (about 47mpg average, including autobahn speeds) although to be fair it's not as spacious as other estates but can't complain especially as we had a bit more space than our previous euro-alpine trip in our MX5 with full camping equipment!
For car spotting, they do love Audi's on the continent and saw tons of them in each country, even more than in the UK. But the only ones of note were a single RS6 and S4 B6.