Mercedes Benz L 206 D Ez: 1977

Hello, I have a problem with my 206 OM 615 220D. I replaced the alternator and found and repaired a cable fire of the battery cable in the wire harness. Unfortunately I forgot to disconnect the battery, which I had previously disconnected and had hung for a short time again for a measurement. When I wanted to isolate the fly cable, there was a short circuit through contact with the body, so I could fix the cable at the place again… stupid run n Everything is isolated, then I wanted to start the car and nothing happens. Neither the light bulb lights up after a certain time, nor is there any muck when the preglow system is triggered. Before everything went great. The fuses under the steering wheel are all in order, the work relay has been changed, unfortunately without success. At the starter 12V arrive. I have no idea what it is anymore, is there still somewhere else a fuse ? thank you for help