ML 320 (163.154) V6-3.2L (112.942) (1998)
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The purpose of the O2 sensor heater is to rapidly heat up the O2 sensors to their operating temperature while preventing damage to the ceramic material
as a result of controlled heating power.
The sensor heater is actuated by the engine control unit through ground. The performance of the sensor heater at operating temperature amounts to:
18 w on Engine 104, 111, 119, 120 and 112, 113 with ME2.0