The timing belt should have been done at 100,000 km.  Take a good look at
the a/c belt ribs, especially where it goes over the tensioner pulley.
Usually the belt begins to crack around 3 years or 30k miles.  I'd wager
that if it's cracked, the timing belt was not replaced.  Who'd replace a
timing belt and not replace a cracked a/c belt while doing it?  

Hop in the car and take it for a good drive.  Check as many things as
possible to see if they are operating properly.  Ideally, drive the car
cold and hot.