Volvo Repair: S60 AWD, Is it worth it?, brake booster, timing belt

Question
I have an S60 2002 AWD with 113,000 miles.  Brake booster is occasionally
hissing.  I have been told the timing belt is due for a change soon.  Is that
necessary and when?  Are there any other potential repairs that I should expect
soon?  Should I make plans to look for something else?

Answer
Andy, TIming belt is over due.  Should have been done at 105k service.  For me, The AWD is a waste.  Nothing but annoying issues like driveshaft and angular gears.  Brakes and A/C issues as well.  If you are going to get an S60 get a non-turbo non AWD and less problems with keep you pocket from not bleeding.  Roger