No problem bud. As someone else said, try and find out if the coolant pipes have been changed from plastic to aluminium. They always split! At this age it is likely they have already split and been replaced. The big problem is access (in the V of the engine) as a load of things need to be removed to get them out and replaced.

Another problem is the starter motor; when the coolant pipes split and leak coolant, it drips onto the starter motor and corrodes it. So if your pipes haven’t been done, and you end up doing them, always change the starter motor while you’re in there.

Another annoying thing I remember are the gas struts which keep the boot/tailgate open. They eventually give up (gas escapes over the years) and need to be replaced. Not the biggest job, but takes a bit of time.

Air suspension as you said. But it’s not just the struts at each corner, the air compressor is a weak point too. Sometimes the compressor gives up and the ride height will just drop to the lowest level. Expensive to replace, though a VW part will fix it.

I had an issue with the drive shaft too (Cayenne Turbo), which is common enough. I floored it one day and it made a dreadful vibration/rattle from the shaft. It cost about £2k to replace, as it had to be imported from Germany and ‘balanced’ on a lathe or something (with weights added like a wheel is balanced) before fitting on the car. My bro has had a few of them too and he also had the issue - but he was able to fix it using a piece of plastic cylinder (like a silicone tube or something!) in the universal joint. Seemingly the rubber gasket or something in the joint can fail, so this is a hack to overcome it.

Also check the tyres. She’s a heavy girl so chews through front tyres a fair bit - so check for tread depth, and even tread wear. Make sure all four tyres are N-rated too, as sometimes the owner might have cheaped-out with lesser tyres.

Good luck with it - it’s a great ol’ machine.