Component description for the fuel temperature sensor - GF47.50-P-2010P
WARNING: This page does not describe the selected car, but rather 28 other vehicles, including the 2012 Mercedes-Benz GL550, 2012 Mercedes-Benz GL450, 2011 Mercedes-Benz ML63, 2011 Mercedes-Benz ML550, and 2011 Mercedes-Benz ML350. However, it is still accessible from the selected car via links, so may be relevant.
ENGINE 642 in MODEL 164.1 /8, 203.0 /2, 209.3 /4, 211.0 /2 /6, 219.3, 221.0 /1, 251.0 /1
ENGINE 642 in MODEL 461.3, 463.3
Location
The fuel temperature sensor is located on the right at the high-pressure pump.
Task
It detects the temperature of the fuel flowing in the high pressure pump and passes this information onto the CDI control unit (N3/9).
Design
The fuel temperature sensor possesses an integral measuring resistor with a negative temperature coefficient (NTC).
Function
The NTC measuring resistor alters its electrical resistance in line with the Coolant temperature. The electrical resistance decreases as the fuel temperature rises.