I assume you don't yet have a workshop manual?
Not intended in a rude way, but why don't you get one?
£12.53 from Amazon.

If you do have one, it should be more clearly explained and illustrated in there
that you could get from a text-only newsgroup.

You may be able to download one free from the internet - I looked for an
electrical circuit for an older Polo on http://www.eserviceinfo.com and it gave
me the whole Haynes manual (just like the one I have!).
They're not as handy as having a book though, and are clearly ripped off.

I think www.clubpolo.co.uk has some common procedures on their forum site, but
it looks as if they've put it in the members only area - that'll cost you £5 a
year membership.   They're a lively  bunch of mostly youngsters, with a huge
knowledge base.