Question about 2005 Mercedes-Benz Mercedes Benz E320 Cdi

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Temperature control sensor

Where is it located

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  • Wesley Golden
    Wesley Golden May 11, 2010

    outside temp or engine temp

  • Marvin
    Marvin May 11, 2010

    for what system?

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Temperature control sensor is located a)oil sensor on the oil filter b)coolant sensor engine block cover

Posted on Aug 14, 2009

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Posted on Jan 02, 2017

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This component detects the temperature of the engine coolant and relays the information to the electronic control assembly. The sensor is located by the heater outlet fitting or in a cooling passage on the engine, depending upon the particular type vehicle. The function of the sensor is to modify ignition timing, control EGR flow and regulate the air/fuel mixture. On vehicles equipped with the electronic instrument cluster, the sensor is also used to control the coolant temperature indicator.

zjlimited_1213.jpg

Fig. 1: Coolant temperature sensor (click image for zoom)



When the battery cable has been disconnected and reconnected, some abnormal drive symptoms may occur while the powertrain control module relearns its adaptive strategy. The vehicle may need to be driven 10 miles (16 km) or more to relearn the adaptive strategy.

  1. Disconnect the negative battery cable.
  2. Unfasten the wire harness attached to the temperature switch.
  3. Place a suitable drip pan below the sensor to capture any coolant that may spill out during removal and installation.
  4. Using a suitable wrench or equivalent, remove the switch from the engine. Remove the washer from the switch and discard.



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Fig. 2: Coolant sensor at the top of the engine block


Hope helps (remember to rate this answer).

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I checked with autozone.com and their site says that the engine temperature sensor is not used on both engine sizes available for this vehicle.

The Coolant Temperature Sensor is used though. So maybe it has a dual purpose on your vehicle.

Coolant Temperature Sensor Operation:00113_coolant_temp_sensor.jpgThis sensor monitors the temperature of the engine and sends that information to the engine control computer to regulate the amount of fuel needed. More fuel is needed if the engine is cold; less if it's hot. If the temperature is extreme, the signal will be sent to the temperature gauge as a visual indicator of overheating and imminent danger.

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  • Then, unscrew it.
  • Reverse the removal procedures to install the new part.
  • Connect the negative battery cable to the battery.









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temp control for cooloing system or heater sysem?

ECT - Engine Coolant Temperature Sensor

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