A few days ago, shortly after the start of the journey, the symbol that I was talking about was shining towards me. The red charging light was out. Now that I had to go home for 60km, I continued. Slowly the battery emptied, first no more BOSE, then the rev counter, then much the servotronics. Just outside the front door I drove through a curve over a few potholes, beep and the symbol was gone, BOSE, rev indicator, servotronics, everything back to normal

Now a new battery stuck, no beeping in the car check system. I measured on the battery approx. 12V in stand and only 12V when the engine is running. Alternator defective?
So alternator out, regulators, coals and collectors looked good. Let the Bosch Service check the part again that the alternator is OK. alternator back in, measured on the battery with running engine now approx 13.2V

What was that now? The charge control light works normally, but why is the battery not charged? According to the circuit diagram, the alternator goes directly to the battery, no instance tells her to charge yourself or not charge yourself. Or is there the instrument cluster still involved (have also the problem of the sporadicly failing tachos)?
Can this have been due to the battery or does any cable have contact again?
Welcome
Jörg