Anyone had any un usual readings for outside temps, mine was reading -23.5 the other morning, for the last few weeks its been reading a tadge low at first but settles after about 5 minuites to something that appears about right

Have a search for the climatronic diagnostics page. I think you can get readouts from the individual sensors (the reading you get on the display is, I suspect, some kind of average of quite a few sensors located around the car). You should also, once you've narrowed down the errant sensor, get some clue as to the location. Could be as simple as a dodgy connection.

Best of luck.

External temp sensor is located in N/S lower grille.

External temp sensor is located in N/S lower grille.

Useful info . I assumed there would be more because I know of at least three interior sensors, but I assume exterior temperature is easier to calculate.