Hello forum, tonight I apparently accidentally left the light on the car (I recognized by the lever next to the steering wheel). This morning the car didn’t start any more. I then tried to bridge with another battery. Didn’t work. Then I tried to bridge my father’s car. Didn’t work. I also saw that the built-in battery had foam-like fluid coming from a small hose-like opening. Then I got the other battery. I was sure that it still works and the car finally started. But now only the headlights go, in the interior all electronics have failed: disc lifter, interior light, speedometer, clock, radio etc. The only thing that still works is the tank indicator. My workshop is full of stress and can only look at my car more closely at the end of next week. I also signed up for the weekend for two flea markets, already loaded the trailer and the (and other) now everything has to fall into the water, because I can’t drive around like this… I would be very happy if anyone had an idea what to try out.