Engine problems in 2001 Saab 9-5?

I'm having problems with my 2001 Saab 9-5 2.3T Wagon. It has 110,000 miles on it and I recently bought it. It was running great until just recently...

1) Check Engine light came on, then went out soon after.

2) The car stalled twice while idling at stop lights.

3) A couple times the car has started rough- it will crank and crank but not start. Sometimes takes multiple tries.

If someone has any theories, please pitch in. I've taken it to two different dealers, neither of which have figured it out. I know Saabs are great cars, this one just has a problem. Please help.