Purchase advice – V70 and XC70

Hello. I’m looking for a car. At the moment v70 and xc70 have jumped into the eye. I’ve picked out some of them and will look at them. However, I would like to have some tips on what are the usual weaknesses with the models! How are the service intervals and after how many km or years are timing belts to change? Find here many different details, don’t look through! Costs? … The vehicles: all diesel, switch v70 5/2003 130ps 114,000km v70 ?/2003 130ps 105,000km xc70 5/2005 163ps 126.000km With the km data I go from ez rather than bj! Thanks for the help!