Gauge temperature My car is bmw 318i m43, e46, european model Problem: when switch is on The gauge temp mark forward when the engine is cold, unpluged water temp sensor, water temp sender, lines wire tested is ok, but gauge temp still there no change possision, when switch is off the guage temp mark normal (cold) so i don´t know wath is the real engines temp Thanks for help

Your description of the problem is not very clear. It seems as if your temp gauge does not work, or does not indicate the correct temperature.
If you disconnect the wire from the sensor unit and put it to battery negative (ground), the gauge should move to the full hot position. If this does not happen the best chance is that the gauge does not work. If it does work, the sensor is faulty. In a very unlikely situation, the wire could be faulty..