Mercedes Benz

2010 Mercedes Benz C 300 4MATIC (204.081) V6-3.0L (272.948) A L L  Diagnostic Trouble Codes ( DTC ): Manufacturer Code Charts 0447 Heating of component G3/3 (Left O2 sensor, before TWC [KAT]) : Open circuit (P0050) Possible cause: - G3/3 (Left O2 sensor, before TWC [KAT]) - N10/1kI (Circuit 87 relay, engine) - N10/1f57 (Fuse 57) - Voltage supply via component Z7/36 (Circuit 87 M2e connector sleeve) Affected functions: - Engine diagnosis - Exhaust system ------------------------------------------------   Test 1: Check power supply of component N3/10 (ME-SFI [ME] control unit).   Test 2: Arrangement of fuses   Test 3: Power supply   Test 4: Check component G3/3 (Left O2 sensor, before TWC [KAT]).   Test 5: Check component G3/3 (Left O2 sensor, before TWC [KAT]). 1. Check power supply of component N3/10 (ME-SFI [ME] control unit).   Test 1.1: Test voltage supply of circuit 87. ( Check using actual value )   Test 1.2: Test voltage supp...