Outside air temperature sensor, function - GF83.57-P-2103-01A

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Function

The resistance of the outside air temperature sensor depends on the ambient temperature and the speed. When the outdoor temperature increases the resistance decreases. This information is relayed via the instrument cluster and serial interface (K1) to the pushbutton control module.

This information causes a slight reduction or increase of the temperature set on the pushbutton control module.

This provides greater comfort by adapting the temperature to the temperature perceived subjectively by the passengers.

The interrelationship between the outdoor temperature and vehicle speed prevents an excessively high temperature from being relayed to the pushbutton control module, when the vehicle is standing still or driving slowly resulting from heat being radiated from the engine. The temperature measured last is used when the ignition is switched off and on and at speeds below 20 km/h.