top or flop ?

Hello, I read some topics up and down, but I still lack some answers anyway. I plan to change the car soon. Currently I drive an MB C-Class. Originally I had to buy an S-80, but are rare cars. As an alternative the XC60 would be in question. So far, so good. As chance happens, I meet an acquaintance who wants to sell his XC60. Would I get quite cheap. XC60 D5 AWD bj. 10/09 with approx. 150 000km automatic transmission. Customer services etc. What do you have to consider with this vehicle? Do the four-wheel drive problems? Thanks in advance for the answers.