Prospective owner

[bennyboy]

Evening all, looking for a classic, fast estate and think I have settled on a B5 S4 Avant. So hoping y'all don't mind me asking the collective a few questions?

Went to see one yesterday and general checks out very well. Understand I need to look out for belt changes in the service history - tick - and possibly turbo replacement - no tick. It's on 141k, starts with no white smoke and the turbos don't whistle. Given age (2000) and mileage, am I likely to have to fork out for new turbos in the near future, which i understand is an engine out job?

The only other thing I noticed was a light grumble on lock - could this be the diff or is it more likely power steering pump?

Thanks in advance!