mercedesbenz Workshop Repair Guides

Mercedes Benz Workshop Service and Repair Manuals

O2 Sensors, Location/Task/Design/Function|Page 983 > < O2 Sensors, Location/Task/Design/Function|Page 981
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temperature upstream of TWC is limited to approx. 350 °C in the condensation phase after cold start. After this, the temperature is controlled to approx.
700 °C. An exhaust temperature is determined from various engine operating data for this purpose and the sensor heated accordingly. 
Different values apply to the O2 sensor heaters downstream of TWC. 

O2 Sensors, Location/Task/Design/Function|Page 983 > < O2 Sensors, Location/Task/Design/Function|Page 981