There is a plug on the side of the fuel distributer that you can check fuel pressure with. It's very likely your fuel pumps are shutting down. The fueling system is like a glorified carburetor, not much to check if the car does not run at all

Fuel pumps, fuel pump relay, or wiring problem

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Eugene

10 E63 AMG
93 300te 4matic
07 BMW X3
14 Ford F-150 Fx2