It's pretty funny that we were just discussing broken down cars in the cold, and I touted Saabs as being well-designed for cold.
For the first time, mine let me down. It was about 5 below zero and I was on the highway. Best I can guess, there's frozen water in the fuel lines? I had left it with around three gallons of fuel in the tank for 8 hours or so. I'd done that many times in the past in similar temperature. I filled up and hit the highway. I got about 5 miles and it just quit. I noticed as I tried to restart it that the electric fuel pump sounds different - more labored perhaps. Hoping that warmer temps and some "Heet" may solve it. We haven't been in the habit of putting any money in the car - just using it 'til something big goes wrong. Brian 84 Saab 900