Outside air temperature sensor function - GF83.57-P-2103-01T
WARNING: This page is about a different car, the 2009 Mercedes-Benz E350 and 2008 Mercedes-Benz E350. However, it is still accessible from the selected car via links, so may be relevant.
The resistance of the outside temperature display temperature sensor (B14) depends on the outside temperature.
The resistance value is evaluated by the driver-side SAM control unit with fuse and relay module (N10/1) and made available to the corresponding control units via the interior CAN.
Taking into account vehicle speed during the measurement of outside temperature prevents excessive temperatures from arising due to a vehicle standstill or driving slowly, e.g. through thermal radiation from the engine, and being passed on.
The coolant temperature sensor (B14) operates in a range of values between 40°C and +85°C.
The last temperature measured is used when the ignition is switched on and off and at speeds below 20 km/h.