Extend or disconnect immobilizer ?

Hello together … I hope that one of you can help me. And I have a later built-in immobilizer from Bosch in my Cali inside. Now I lit up the battery lamp once during the ride and it went out to me. Then I wanted to start again, but there was no ignition on the station wagon. But the starter didn’t work. After about 5 minutes waiting everything went great again. Now I recently put in a new Lima and battery, because the Lima only 11Volt load 3 weeks ago the same thing happened to me again. I wanted to go to work in the morning and after it was a bit cold I turned on the seat heating. There also the battery lamp lit immediately and it went out again to me. The same again, no ignition on the station wagon, but the starter goes… Now I want to ask if someone can tell me how to disconnect the immobilizer or what kind of cables I have to cut. . Would be very happy if someone could help me!!! Thanks already in advance…