Ford Transit Built 2010 AHH00383 4 does not jump to immobilizer/control unit???

Hi, I hope someone can help me. on the way home with my transit the car jerked and did not accept fuel (filter clogged). Could also drive only 40km/h…. the car had to restart all the time and made it to the motorway exit. Then the car went out and did not jump any more…. Then changed the filter and towed the car with fully charged battery and drove to the workshop….during the journey the car is a I jumped after I let the clutch come. Then I drove alone to the workshop (cluster screwdriver)…. After I turned off the car it did not jump on anymore and the display no longer lights up….. when I turn the ignition key…. First thought that the starter is defective….but that can’t be when the display no longer lights up.. Then I changed the ignition lock (Ralais 20€uro)… but the result is the same…Display The only thing that happens now is that the control unit behind the glove compartment clacks…. and that stops clacking after 5 seconds…. Who can help and say where the problem is….. is worried that I have to buy a new control unit…. Lights in the car and headlights glow quite normally…. maybe this has something to do with the immobilizer…… who can help me and tell me what it is!? Thanks for your help πŸ™‚ Sascha