What temperature of cooling water are the B3’s running with? Since yesterday the display in the AI (Temp.-Fühler was a wrong one) works with me again. After 3 – 4 km it shows 80 °C, but then increases hardly any more with moderate load, even after 11 km the engine was stable at good 80 °C. Heating is relatively fast after the cold start, so I suspect that the thermostat works. Of the “newer” cars I am used to that they always come to 90 °C temperature, and they also keep them strictly.