hello mate,
when you click on the mk5 section on this forum have a look at the top thread, its a list of common faults and that should be able to give you a idea of what to look out for!
all in all there brilliant little cars! i drive a 1.4 se and really couldnt be happier with it!
i think your on to a winner with a polo
but like i said take a look at the section, in fact heres a link!
http://www.uk-polos.net/view ... =13&t=1158
hope it helps, joe