Mine is not an Allroad but as far as the similar bits are concerned:
Bought mine with FASH at 109000 and now 172000 no engine problems except new N75 valve and MAF. Long life servicing is working OK every 20000.
Cam belt done at 160000 ie 80000 interval.
Got it chipped soon after buying, recommend it, there's choices.
Have replaced both front CV joints and wheel bearings, offside front bearing twice. Have just been told one of front offside suspension arms is worn.
Still on original brake discs, clutch, exhaust, Xenons,
Quattros can have all 4 wheels aligned. Got my 4 wheel alignment done, looked like it had never been touched at back.
Auto dipping headlamp has failed, switch inside front nearside wheel arch needs looking at.
I have posted on mine all over the place, search for fjtwelve.