Today I started the car and something with the temp happened
The car had been standing all night and it is like 0C deg.
The temp was a little over the middle. Its like it is stuck there or something. 91 BMW 850CSI

possibly a faulty sensor. If you read the live values, it should point you in the right direction  Bodsys Brake Bible
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So does this mean I have to go to the service to have the faults read? 91 BMW 850CSI

Funny thing. Went to the car this morning and looked at the needle through the window.
It was still in the same position.
Any ideas? 91 BMW 850CSI

Guess I am the first with that problem  91 BMW 850CSI

Tokk the car for a drive. The meter went full up, but no warning came and the engine was allrigh.
I shut it down and the arrow fell to the middle  91 BMW 850CSI

Have you tried a hard reset, as suggested on the D3 forum?

Well. Today I disconnected the battery. The gauge was in the same position. The needle went to the top, but no warninglight came. How does the car react when overheatiing?
That blows. Here is how the engine runs. Are the fluids ok?

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This is after the car was driven 12 miles and was warm

Here is a picture how the needle looks when the car is off.

Click image to enlarge

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I went to the dealer and had them look at this.
They say the whole cluster needs to be replaced  91 BMW 850CSI