Ambient Air Temp Sensor

[dragon green]

I have used the search,and have read my Bently manual,many,many times !
My ambient sensor reads 50c (Europe) i bought a new one,still the same,tried three others from breakers,to no avail ! changed the clocks,checked both wires and re-wrapped to dash.
It reads 50c all the time its 10c or hotter !
If the ambient temp is 7c,i get a reading of 43c !
Freezing point for me is 40c ! lol
Is there any way of resetting the temp scale ? or am i missing some piece of vital information ?
Thanks in advance

[chc-rado]

I would check the wiring to connector to the fuse box. Could be high resistance in the wiring. Also the check the cluster harness too. Worst case, your cluster could be bad, just saying.