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Home >> Mercedes Benz >> 2008 >> SLK280 Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Interior/Illumination Lights >> Electrical System - Body - 171 Chassis >> Basic Knowledge (-2008) >> SOS switch, location/task/design/function - GF82.95-P-4107SK >> SOS switch, function - GF82.95-P-4107-04SK

SOS switch, function - GF82.95-P-4107-04SK

In the park position an electric current flows via the control resistor (parallel to switch contact) installed in the SOS pushbutton switch (S93/3). This indicates to the emergency call system control unit (N123/4) that the feed line and the ground line are OK. When the SOS pushbutton switch (S93/3) is pressed the control resistor is bridged by a switch contact.

The SOS pushbutton switch (S93/3) is read in via a discrete line from the emergency call system control unit (N123/4). By pressing the SOS pushbutton switch (S93/3) a manual emergency call is recognized by the emergency call system control unit (N123/4) and is then made.

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