Component description for the fuel level sensor - GF47.10-P-2010AMG

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MODEL 164, 251 with ENGINE 156.980

MODEL 209 with ENGINE 156.982

MODEL 211, 219 with ENGINE 156.983

MODEL 216, 221 with ENGINE 156.984

Location except model 216, 221 (shown on fuel tank model 164)

Each chamber of fuel tank contains a fuel gage sensor.

Fig 1: Identifying Fuel Level Sensor Components Location Except Model 216, 221 (Shown On Fuel Tank Model 164)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Location on model 216, 221

The right fuel level sensor is located in the right fuel tank chamber. The left fuel level sensor (with float in the left fuel tank chamber) is located in the middle of the fuel tank.

Fig 2: Identifying Fuel Level Sensor Components - Location On Model 216, 221

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Task

Determines the fuel level for the following functions:

Fuel level indicator
Leak tightness test of the regeneration system (for )
Combustion misfire detection

Function

The float changes the position of the lever (with the double potentiometer) in line with the fuel level. This changes the resistance value of the double potentiometer and thereby influences the output voltage, which is a measure for the fuel level.

Both sliding contacts of the double potentiometer are switched in parallel.

Model 164, 251

Each fuel tank chamber has a fuel level indicator sensor. Both the voltage signals are transmitted separately to the rear SAM control unit (N10/8) which processes the signals accordingly and transmits them to the instrument cluster via the CAN data bus.A1

Model 209, 211, 216, 219, 221

Each fuel tank chamber has a fuel level indicator sensor. Both voltage signals are transmitted separately to the rear SAM control unit with fuse and relay module, (N10/2) which processes the signals accordingly and transmits them to the instrument cluster over the CAN data bus (A1).