HELP!!! My Saab doesn’t start

Hi guys, I was on the highway at 160km/h with cruise control and suddenly I had the feeling that he didn’t get any fuel. So I switched off the cruise control and gave gas myself. Unfortunately, no success. The Saab is simply rolled out and stopped. Then I turned off the car and tried to start again, unfortunately without success. So I called the ADAC. That came, did not bring the wagon to the start. ADAC said it could be the diesel pump or auc h the filter. Now with a friend who knows a little bit, the car looked at itself. 100% he could not say anything. I can not drive the car for 1 month and it is on the front door. I find it a pity. How or who can help me. Please for a help. Thank you