O2 sensors, location/task/design/function - GF07.04-P-4103M

ENGINE 275.950 in MODEL 215, 220

ENGINE 275.951 in MODEL 230 up to Model Year 8

ENGINE 275.953 in MODEL 216, 221 up to Model Year 8

ENGINE 275.954 in MODEL 230 up to Model Year 8

ENGINE 275.980 in MODEL 215, 220

ENGINE 275.981 in MODEL 230 up to Model Year 8

ENGINE 275.982 in MODEL 216, 221 up to Model Year 8

ENGINE 285.950 in MODEL 240

ENGINE 285.980 in MODEL 240

Fig 1: Identifying O2 Sensors And Catalytic Converter

Courtesy of MERCEDES-BENZ USA

O2 sensors, location		GF07.04-P-4103-02M
O2 sensors, task	Detecting the residual oxygen content in the exhaust and supplying a signal to the ME control unit. O ₂ sensor upstream of TWC (slave sensor): Lambda control Self adaptation of the mixture formation Functional chain tests O ₂ sensor downstream of TWC (master sensor): Two-sensor control Monitoring of catalytic converter efficiency.
O2 sensor design		GF07.04-P-4103-03M
O2 sensors function		GF07.04-P-4103-01M