Carl M

Hi, currently have an A6 (my 1st ever Audi) and absolutely love it but the time has come to replace it and I was thinking of going for a used Q5, roughly 3 years old. Before I start looking, is there anything I should look for (was advised when I got the A6 so make sure gearbox oil had been changed at 60k etc). Are these generally reliable cars? Are the service costs high? Thanks for any advice