I have a 2003 Jetta TDI. I drove it last night with no problem. This morning I cannot start the car. I popped the hood, and discovered air in the fuel line between the fuel filter and injection pump. In fact, I don't see any fuel in there at all!
The only thing I've done to the car recently was have an oil change, about a week ago.
I also don't see any sign of fuel on the ground.
What may have caused this?