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Mercedes Benz
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1999
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S 420 (140.043) V8-4.2L (119.981)
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Repair and Diagnosis
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Sensors and Switches
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Sensors and Switches - HVAC
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Climate Control Exhaust Gas Sensor
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Locations
Climate Control Exhaust Gas Sensor: Locations
The smog sensor (B31) is located at the right rear in the engine compartment in the air collection housing.