Thanks, but the links above and what I've found say that the display is not working, only showing dashes but mine actually displays a reading which appears to increase and decrease as would be expected but is greatly over reading. Last week on start up the outside temp was about 10°C but the display was showing 50°C and increased as the day got warmer. Is there a way to reset the thermostat?
Does anyone actually know where the sensor is? I've just looked on line and it's either in the mirror, in the wheel arch or in the engine compartment?????